LESSO

MARINECAGECULTURE SYSTEM

ENGINEERING MANUAL

CHINA LESSO GROUPHOLDINGSLIMITED

China Lesso Group Holdings Limited (Stock Name: China Lesso, Stock Code: 02128.HK) is a large industrial group of home furnishings and building materials in China.China Lesso’s business porfolio spans plastic piping, building materials and home furnishings,environmental protection, supply-chain service platforms and the photovoltaic sector.It offers products such as pipes, photovoltaics, plumbing and sanitary ware, integral kitchen materials, integral doors and windows, aluminum formwork and smart scaffolds,water purifiers,water-proofing materials and sealants,fire-fighting equipment, valves,cables, lighting,hygiene materials, items for environmental protection, agricultural facilities, and oceanic aquaculture cages. Its sales revenue has reached RMB 30.767 billion in 2022.

With the rapid development of internationalization and globalization, China Lesso boasts more than 30 advanced production bases distributed in 18 provinces across China, and in some foreign countries. China Lesso remains committed to improving its strategic layout, broadening its sales network and expanding the market. This is how it provides products and services for customers in a timely and efficient way.

China Lesso has established its R&D center with more than 1,0o0 scientific researchers. The Group now possesses twenty-eight national high-tech enterprises, one national accredited enterprise technology center, two post-doctoral workstations,five China national accredited laboratories authorized by CNAS, one key enterprise laboratory of plastics molding and processing technology in Guangdong Province, and one union of Technical Innovation of Plastic Pipe Industry in GuangdongProvince.

China Lesso owns over 220o patents (some of them are pending). Some of Lesso' s scientific achievements are included in National Torch Plan Projects, National Key New Product, Scientific Achievements Promotion Projects in National Construction Industry and Government Green Procurement List. The Group has been awarded many honorary titles and prizes, such as Champion Manufacturer, China Construction Independent Science Innovation Superior Enterprise, Intellectual Property Right Preponderant Enterprise, Industrialization Demonstration Base, Outstanding Patent Owner in China, Guangdong Provincial Government QualityPrize,and the First Prize of ScientificTechnological Progress in Guangdong Province,and the First Prize of Scientific TechnologicalProgress of China Light IndustryAssociation.

As a domestic manufacturer of extensive home furnishings and building materials, China Lesso provides over 10,ooo varieties of products with all specifications. Its products are being widely used in many areas, including home decoration, civil construction， municipal water supply， drainage, power supply and telecommunications, gas supply,fire-fighting, environmental protection, agriculture, oceanic aquaculture, and photovoltaic power generation.

True to its slogan of “Envisioning the Better, Building the Future”，China Lesso willhonor its promise of creating a healthy, enjoyable,and sustainable environment.The Group remains committed to improvements in urban construction to create better places to live.With concerted efforts from various sectors, Lesso willfully play its role in building green, livable, and efficient cities so that people could enjoy health and happiness anytime and anywhere in their city life.

Cohesion and Drivers for Progress

JOINHANDS,FORGEAHEAD

China Lesso Group Holdings Limited (Stock Name: China Lesso, Stock Code: 02128.HK) is a large industrial group of home furnishings and building materials in China. China Lesso' s business portfolio spans plastic piping, building materials and home furnishings, environmental protection, new energy, supply-chain service platforms and others.

Contents

Marine Cage Culture System

Engineering Manual

Preface... 01
Part 1:Product Introduction
1. Product Introduction ... 02
2. Application Fields.... 02
3.ProductFeatures... 02
4. Physical and Mechanical Performance Indicators. 02
5. Supporting System... 03

Part 2: On-site Installation of Cage Frames

1. On-site Installation and Construction Requirements for Cage Frames .. O4-08
2.InstallationProcedure for Cage FrameSystem .... .0.9-14

Part ll: Cage Anchoring System Installation

1. Production of concrete anchors .. 15 2.Production of the AnchoringPlatform... 16 3. Overal CageLayout... 4. Cage Anchoring Setup(Recommended)...... 1. 5.CageAnchoringConstructionRequirements .... 6.Anchoring InstallationProcedure.... 19-23 Part IV: Instructions for Use ...... 2.4 Part V: Product Certification ... 25-26

Preface

The pipes and fittings for the HDPE marine culture cage system produced by our company are made of high-density polyethylene, formed by extrusion and injection molding. In addition to its excellent corrosion resistance, environmental friendliness and durability, the pipes and fittings also have smooth surfaces with low flow resistance. The cages are produced using special imported PE materials combined with an innovative compartmental design. As a result, they are tough, strong and very safe. As a new, innovative product, Lesso HDPE marine culture cages have greatly improved overall performance in terms of wind resistance, wave resistance, and ocean current resistance when compared with traditional designs. They are more convenient to use, safer and more efficient, and have already become very popular within the industry.

Part 1: Introduction to the Marine Culture Cage System

1. Product Standards

1. The products are manufactured according to enterprise standard Q/LS-58;
2. The company specializes in cage pipe products with standard size ratios of SDR11, SDR13.6 and SDR17;
3.The product comes in black and yellow as standard,but can alsobe customized according to customerrequirements;
4.Thecagepipeisnormally9mor 12\mathsf{m} long as standard, but can also be customized according to customer requirements;

2. Application

1. In the fishing industry, this product is suitable for creating different types of culture cages;
2. Large fish ponds, reservoirs, hydropower stations, wharves, seaports and other water environments; suitable for floating tourist bridges,
operatingplatformsandfloatingbridges
3. In the shipbuilding industry, the product is suitable for building small boats and rowboats with simple structures;
4. In terms of tourism and recreation, the product is suitable for building diferent types of swimming pools.

3. Product Features

1. High-cost efficiency

The net cage has a large volume and a high output, making it suitable for large-scale production and commercial operation.ecause it is located far away from land, the water quality is excellent. As a result, the cultured seafood is of high quality, has a high survival rate, and growsquickly.

2. Strong wind and wave resistance, good resistance to cold, and long service life

The HDPE marine culture cages are made of high-density, high-toughness HDPE materials. These can resist level-12 typhoons and withstandtemperaturesdownto -50°C. Standard service life is more than 15 years, making them suitable for deep-sea cultures.

3.Environmentally friendly,non-polluting

The HDPE marine farming cage is made of HDPE material, which is pollution fre while being extremely corrosion resistant.

4. Expanded culture space

Due to its strong wind and wave resistance and long service life, HDPE marine culture cages are suitable for deep sea cultures away from land-based pollution, minimizing pressure near the bay and expanding the culture area.

5. High security

Lesso HDPE marine farming cages areprotected bysafety guardrails and foot pedals,which provide a safe and reliable platform forfarmers andsightseers.

4. Physical and Mechanical Performance Indicators

5. Supporting System

Pipes and fittings for the cage system.he company produces cage buoyancy pipes,brackets, sealed direct joints, sealed 90° buttelbows, and stoppers of various specifications based on customer requirements (the sealed 90° butt elbow is used to installthesquarecage).

Part 2: Installing the Cage Frame Onsite

Requirements for on-site installation andconstruction of cage frames

1.Siterequirements Thecage framerequires a 100mx80m installation and material stacking site, which should be flat, firm and clean.

2.Personnelrequirements:

A.Requirementsforconstructiontechnicians:
① Proficiency in PE welding, as wellas the operating specifications of the various components;
② Ability to provide technical training to all participating construction operators;
\circled{3} The content of this training should include,but willnot be limited to: project introduction,construction environment,source of potential hazards, occupational health and safety, proper construction and environmental protection requirements, technical disclosure; number of participants: 1-2 people.
B.Requirements for construction operators:
① Welding personnel must have the required cerification or experience for HDPE pipe welding, and be able to work independently;
② Personnel responsible for the temporary set up of power facilities on the site must have the relevant power construction qualifications;
③ The site must be equipped with port operations and electric power safety officers; number of people required: dependent on specific situation.

3.Power requirements: 220V, 40A AC power supply,with a power output of around 10kW.

4.Equipment requirements:

A.Butt welding machine; suitable for welding pipes,straight joints and elbows toDN315,DN355,DN400 and other specifications;
B.Butwelding machine; suitable for welding pipes, elbows and strip pedals toDN110,130x50,145x75 and other specifications;
C. Arc face butt welding machine; suitable for welding stop blocks to R157.5, R177.5, R200 and other specifications;
D.Reciprocating chainsaw, with a blade length of around 50omm;
E.Electricdrill:drillbit diameter 13{-}1 5mm drillbitlength200-250mm;
F. Electric wrenches and bits suitable for tightening M12 hexagonal bolts;

5.Requirements for temporary items:

A.Forklift or excavator (for bending and aligning large-diameter pipes): 1 set
B. Work boat (for towing the installed net cage): 1
C.Motorized vehicles(forshort-distance handling of items):asrequired
D. Generator (about 1okW,for supplying power in situations where standard power supply is not present or unstable):1 set
E. Crowbar (about 50mm in diameter, press-fit hot-melt stop block): as required
F. Long-handled sledgehammer 3-5kg hammered with guardrails): as required
G. Protective tools (work clothes, shoes and hats, gloves, parasols or tents, used for operation and rest): as required
H. Traction rope (diameter 16-20mm, used to indicate position, temporary fixation, and assisting in bending alignment): 50\mathsf{kg}
I. Power plug boards (to provide sockets for welding machines, chainsaws, etc.): as required
J. Cables (for power transmission): as required
K. Grease pen (white, for marking): as required
L. Steel tapes (for measuring): as required
M.Scrapers(forscrapingoff melted glue):asrequired

6. Cage frame size:

8. Cage material list

2. Installing the Cage Frame System

Five key steps:

Welding of pipe products, installation of brackets, installation of guardrails, installation of pedals and accessories.On the construction site, machines, parts and accessories should be suitably positioned from the perspectives of safety, energy savings and efficiency.

1. Pipe welding

The length of cage pipes are fixed before delivery, usually 9 or 12 meters. Therefore, during construction, the required pipe quanty and cutting length should be calculated based on the total length and fixed length of the pipes. The following describes the installation procedure, using a circularcagewithacircumferenceof60metersasanexample.

1.1 Buoyancy pipe welding The total length of the inner ring of the buoyancy pipe should be 60 meters, and the length of the outer ring 65 meters. Weld 1 sealed straight head every 15 meters at most (so that the inner cavity of the inner and outer buoyancy pipes is divided into 4 independent chambers to prevent water intrusion and sinking).Measure, mark, and cut off the fixed-length part of the pipe, and directly weld it to the sealing connector. After the buoyancy pipe has been welded in place, mark the position of the bracket on the buoyancy pipe of the inner ring. Draw a marking line every 1.5 meters to determine the correct position for installing the brackets.

L.Steel tapes(for measuring):as required M.Scrapers (for scraping off melted glue): as required M.Scrapers (for scraping off melted glue):as required

1.2HandrailpipeweldingEach turn of thehandrail pipe is 60 meters long.Select the numberof turnsof the handrailpipe based on the typeofcolumnand theactual needsonsite.Amaximum of 3turns can be installed.The specific number of turns can be determined by the customer depending on their specific requirements and local sea conditions.It isrecommended toinstall 2turns.Takethefixed-length handrailpipeusedforwelding,andkeep alengthof about 2meters in reserve.After welding,place them separately and straight at the designated positions,without staggering.

1.3Pedal weldingSelect thenumberof turns dependingon the selectedbracketmountingsurface and thewidthof thepedal.Adjust thenumberof loopsdependingontheactual customerrequirements at site.Taking a 315 single bracket as an example,the width of the bracketinstallationsurfaceis1oo5,whichcanbematchedwith 1 30x50 Pedalscanbeinstalled withupto7turns.It isrecommended to install at least 5 loops. The outermost loop is 65 meters,and the innermost loop60meters.Blackandyellowpedalscanbeselected as required. The suggested solution is having the middle loop in yellow and therest inblack.Inprinciple,onlypedalsof thesame color canbe welded together.Take thefixed-lengthpedalforwelding,and keepaside alengthof about 1 meter.Afterwelding,place them separately and straight at the designated position, without staggering.

Notes:

① In the process of welding the pipeparts,molten PE(weldingbead) raised on the surface of the buoyancy pipe and handrail pipe should be scraped off with a scraperalong theperipheryof thepipe before it can solidify. If it this not scraped off, it willbe difficult (or even impossible) to install brackets and guardrails later on.

② Welding specification reference standards:TSG D2002-2006 Technical rules for welding polyethylene pipes for gas, CJJ 63-2008 Polyethylene Gas Pipeline Engineering Technical Regulations, CJJT 98-2003 Building Water Supply Polyethylene Pipeline Engineering Technical Regulations.

2.Bracketinstallation

Brackets shallbe assembled before buoyancy pipes are closed into loops.This operation can be performed after the innerand outer buoyancy pipes are welded according to the required length, or after marking but before welding.

2.1 Bracket assembly The following describes how to install 40 brackets fora 60-meter circumference cage frame as an example.To facilitate bracket installation, the two buoyancy pipe brackets are lifted off the ground, as shown in the figure below:

Then the required support needs to be placed into the hole of the buoyancy pipe in the correct direction.Move the bracket as far as possible to the middle of the buoyancy pipe.This process requires both machines and tools.It will be both convenient and labor-saving toopen the sleeves from both ends of the buoyancy pipe when putting them on. Seethefollowing figure:

2.2 Welding the ends of the buoyancy pipes The openings at both ends of the buoyancy pipe can be welded and closed after the support has been installed. During operation, bend the straight buoyancy pipe into an approximate ring by using an excavator or a forklift and a traction rope.Bend the innertube first, then the outer tube; weld the closed inner tube first,then weld the closed outer tube.See the following figure:

When bending the buoyancy pipe using auxiiary equipment such as an excavatorora tractionrope, make sure to tie it firmly in place. No one should stand outside the rebound area of the buoyancy pipe to avoid any potential accidents, as shown in thefollowing figure:

2.3 Moving the bracket After the inner and outer buoyancy pipes have been welded and closed,move the bracket to the positionmarked on the buoyancy pipes.During this operation,raise the buoyancy pipe bracket up quickly to a certain height from the ground using an excavator or forklift.

If conditions permit, drag the internal and external buoyancy pipes that have been welded and sealed intothewater together with the bracket.In this case,the cage frame floats on the water surface, while internal tension forms a complete ring.Once the bracket is free from the ground and lubricated by water, it can be moved more easily. See the followingfigure:

3.Pedal installation

After the bracket has been installed and shifted into place, the pedals can be installed on land or on water.

3.1 Placing the pedals Transport the fixedlength welded pedals to the floating frame.You can ship and installthem one at a time, or transport the required number of pedals to the floating frame in one go and then install them one by one.See the following figure:

3.2 Fixing the pedals Fix the outer circle of pedals first,then the inner circle.During installation, use crowbars and stopblocks to ensure the correct distance between the pedals.Note that there are anti-skid bumps on the pedals. Use an electric drill to drill holes where the pedal rests on the bracket, and trytocenterthesupportsurface of thebracket to avoid anybracket ribson thebracket.Then use the bolts to lock the pedal and the bracket in place with an electric wrench, as shown in the following figure:

3.3ConnectingthepedalendtoendWhen connecting the two ports of the pedal, each port should beconnected tothebracket using twobolts toensureasecure connectionanda smooth interface,as shown in thefollowing figure:

4. Installing the guardrail

After the pedals have been installed, the floating frame will now have a working platform.You can stand on it to install guardrails and handrail pipes.

4.1 Threading the guardrail Transport the required handrail pipes to the floating frame and arrange them neatly along the circular floating frame. Move the guardrail to the floating frame. Insert guardrails equal to the number of brackets from both ends of the handrail pipe in sequence. Note: When threading the guardrail, each pipe must have the same pipe hole corresponding to the guardrail, as shown in the following figure:

4.2 Moving the guardrail Aftercovering alltherequired guardrails, use the rope to pull up the handrailpipe and move the guardrails to the vicinityof thecorresponding bracket installation holes,as shown in the followingfigure:

4.3Pre-insertingtheguardrailHoldupthehandrailpipeand guard rail. Except for the four guardrails near the two ports of the handrail pipe,pre-insert the rest of the guardrails into the mounting holes of the guardrails on the brackets, as shown in the following figure:

4.4 Knocking and installing the guardrail

By applying an external force with the aid of a long-handled hammer, knock the head of the guardrail until the lower end surface of the square section of the guardrail sticks tightly to theupper end of the fixed column on the bracket guardrail,as shown inthe following figure:

4.5 Welding the handrail pipe end to end

Cut the excess length with a chainsaw, weld and seal the handrail pipe with butt welding. Installthe four guardrails near the closure, as shown in the following figure:

4.6SecuringtheguardrailwithboltsAftertheguardrailhasbeen knocked and installed, install the bolts to ensure that it will not break awayfromthebracketduringextendeduse.Thespecificstepsareas follows: Use an electric drillto drillholes on the two small platforms on the outside of thebracket guardrailpole installation column.Theholeshould not be off-center;it should enterfrom theplatform on one side and exit from the platform on the other side.It should be completed with a single drill in one go.Insert the bolts and washers,and tighten the nuts with an electricwrench.

5. Welding the stop block

The stop block is an important part that prevents the stand from moving. After the cage frame has been installed, install 2 stop blocks every other bracket If it is a cage without pedals, install 2 stop blocks for each bracket. The operating procedure is as follows: Use the arc face welding machine and crowbar to heat the arc face of the stop block and the buoyancy surface of the outer ring 30mm from the left and right sides of the bracket at the same time. Then,loosen the crowbar and remove the welding machine, and use the crowbar to press the stop block until it cools andsolidifies,asshown inthefollowingfigure:

6.Installingwarning lightsandplacing cagesintothe sea

The solar warning light emits light at night, providing a warning signal for when ships approach the cages at night. The lights should be installed on the side of the upper part of the guardrail, close to the outward side of the pedal, as shown in the following figure: The installed cage can be pushed into the sea using an excavator, or hoisted into the sea with a crane; it can also be dragged to a predetermined area by using a working boat and a traction rope,then waiting for anchoring. The cage frame system is now installed, and should look like the figure on the right:

Part Ill: Installing the Cage Anchoring System

1. Production of concrete anchors

Appropriate fixing methods should be used based on the actual conditions. Using the anchoring method of a concrete anchor as an example,the production site should generally be a flat open space near the shore of the sea area where the cage is installed. The concrete anchor is made of cement and crushed sand, which need to be mixed by a cement mixer. For the formwork of each concrete anchor, pre-embed several steel skeletonswithadiameterof 13\mathsf{mm} for the middle part of the top surface and the middle part of the side surface, pre-embed and protrude a PP ringropewithadiameterof 60\mathsf{mm} each concrete anchor weighs about 5.9 tons and has a volume of about 2.6\mathsf{m}3 forcementandsteelbars, see relevant national standards; for the main points regarding concrete anchor production, see the following figure and the dimension diagram.

concreteanchordimensions

Il. Anchoring the Platform

In many ocean areas with no large ships in the vicinity,it is often necessary to temporarily construct an anchor platform as a device for providing buoyancy. At the same time, using the traction of the small boat, the concrete anchor can be pulled and transported to the predetermined position on the ocean.Afoam anchorplatform isformedbyweldingand binding I-shaped steel, 90° angle steel, steel sheet, a foam floating ball, and tie ropes. The displacement of a single anchor should not be less than about 1.5 times its weight. Seethefollowingfigure:

3. Overall Cage Layout

The overall layout of the cages should be arranged fromnear tofar from the coast, and along the direction of perennial tidal flows. They can be arranged in groups of 1, 2 or 4.Group of 1:a 60m cage covers a sea area of about 150mx150m;Group of 1:a 80m cagecovers a sea area of about 160mx160m; Group of 2: a 60m cage covers a sea area of about 150mx180m; Group of 4: a 60m cage covers a sea area of about 180mx180m. To make full use of and protect the sea area, the anchor positions for cages of adjacent groups can be shared. Two or four mooring ropes should be tied before anchoring,as follows:

4. Cage Anchoring Setup (Recommended)

The setting of the cage anchoring is not static. Farmers can design or choose the most suitable anchoring setup based on factors such as past experience, local sea conditions, area available for culture, number of cages, and perennial climate conditions.Threetypicalcageanchoringconfigurationsarerecommended:

Figure 1. Typical anchoring configuration for a group of 1

Figure 2. Typical anchoring configuration for a group of 2

Figure 3. Typical anchoring configuration for a group of 4

5. Cage Anchoring Construction Requirements

1. Site requirements:

A. A wide sea area with a water depth of 10-15 meters; B.Wave height <0.5~m (during construction);
C. Flat sandy hard seabed;
D.Sunnyweatherwith litlewind

3.Requirements for temporary items:

A. Operating boats (for transporting concrete anchor, maintaining tension onPPrope):2;
B. GPS locator (locating the anchorage point at sea): 1;
C.Traction rope (diameter 16~20\mathsf{mm} ：50kg；
D. Long-handle pull hooks (pulling up the PP rope): 2-3;
E. Serrated sickles (for cutting PP rope): as required
F. Anchoring platforms (concrete anchor for sea transportation): 6; G.Crane (lifting concrete anchor): 1;

2. Personnel requirements:

A.Requirements for engineering and technical personnel:

① Design and select different anchoring configurations according to seawater and seabed conditions;
\circled{2} Draw the cage anchoring layout based on the sea conditionsandlocalclimate;
③ Select the predetermined anchor position using a GPS locator;

C. Helmsman requirements:

① Proficiency in ship navigation technology; number of people: 2;

B. Requirements for divers:

① Consummate swimming and diving skills;
\circled{2} Able to understand the technical drawings of the anchoring configuration;
③ Proficiency in various rope-tying skills; number of people:2-3;

D. Requirements for auxiliary personnel:

① Assisting in operations that divers and helmsmen cannot complete; numberofpeople:3-5

4. Materials required for cage anchoring system (for reference only):

Table 1: Bill of materials for 60m-DN315(355) cage anchoring system (for a group of 1)

Figure 1:60m-DN315 (355) cage anchoring system (group of 1)

6. Anchoring Installation Procedure

It is mainly divided into 5 steps: frame rope connection, cage pre-mooring, tethering and anchoring, anchoring and pulling the cable, hanging iron pendant, etc. The following describes the cage anchoring system installation steps and operations.

1. Connecting the frame rope: Because the construction difficulty of tethering at sea is quite large,the tethering frame rope of the cage is fastened in advance on the bank or near-shore shoal to reduce construction dificulty and safety.

1.1 Cutting the rope

The purchased ropes are usually coiled, so distinguish them according to the specifications on the shore.Cut the frame ropes,mainropes,cables,and anchor ropes according to the length determined in the construction drawings.Both ends of thecutropeshouldbewrappedwithelectrical tapeand tied tightlywithcable ties toprevent it from loosening.Each mooring rope is cut to10m.Reserve a long tension installationlengthfor cables.Usually,the effective length is 80\mathsf{m} plus15m of tying and tensioning length to facilitate the follow-up operation of berthing stay ropes at sea.There shouldbe enough length at both ends and in the middle of the frame ropeto tiea knot,which has beenreserved as arule of thumb beforecutting the rope.Typically,a total of 15m of tie length is left(that is,when cutting the rope, add15mto the effective length markedon the drawing).Reserve5m of tether for each vertex of the main rope.Finally, coil the cut rope,tie it with a thin rope, and move it to the crane operation area.Transport the frame rope and main cable to the assembled cage placement area;transport the mooring rope and cable to the concrete anchoranchoring area.See thefollowing figure:

1.2Connecting theframerope

Choose the appropriate frame rope and tie itto the corresponding position on the cage (see the schematic diagram for anchoring configuration). The framerope has a diameterof 40\mathsf{mm} Tie the frame rope to the cage,then tie the main rope to the frame rope. Tie the frame rope first and then themain rope.

The frame rope should be tied to the inner and outer buoyancy pipes of the cage. The span at both ends of the frame rope should be evenly arranged according to the drawings or the number of brackets. There are multiple groups of frame ropes, with the number of groups being different for different cage configurations, depending on the drawing requirements.

1.3 Connecting themain rope

The main rope is the tie that connects the frame rope to the hawser, and is also the main load rope connecting the vertices of all the frame ropes. The main rope has a diameter of 60mm. Form an enclosing circle of a square to the whole cage frame in four directions. It should be tied to the top and bottom of the frame rope, with a tether loop reserved for threading the mooring rope.

2. Pre-mooring the cage

Tow the cageframesystem tiedwith theframerope and themain rope to the pre-positioned sea area by GPRS using the operating ship,and wait for the throwing of the anchor.Generally speaking,in the absence of heavy wind and waves, the floating cages do not moveagreatdistance.Seethefollowingfigure:

3. Connecting the mooring rope and transporting the anchor

In principle, the mooring rope and cable will be connected to the shore, and afterthe connection has been completed, they should be piled up in a regular manner, thus facilitating subsequent anchoring and puling. Each anchor position of the cage needs to be equipped with two concrete anchors.If there is a shared anchor position,tie two or fourcables together.

3.1Connecting themooring rope and cable

On the shore, connect two adjacent concrete anchors end to end using a 10m long mooring rope through the rope ring of the concrete anchor.
Then use one end of the cable to fasten to the mooring rope. Usually, the effective length of each cable should be no less than 80m.

3.2Lifting and handling the anchor

Hoist the concrete anchor to the shore, and drag the anchor platform to the water edge. Hoist a single platform around a single concrete anchor. Then use a 40mm rope tocoil the anchorseveral times,and tie it securely to the main beamof the anchoring platform.Finally,hoist the concrete anchor and the platform into the water together. At this time, all the concrete anchors are submerged in the sea, but they will stillfloat due to the buoyancyprovidedbytheanchoringplatform.

During the anchoring process, avoid obstacles such as rocks and hidden reefs that hinder the transportation of the anchoring platform. The water depth of the channel should not beless than3m.Every two platforms are a group(two concrete anchors should be thrown at the same time at each anchor position), each of which transports one concrete anchor. Generally, every four platforms are in a string, and they are connected with ropes.Finally,tow it to the specified sea area using the operating ship.See the following figure:

4.Throwing the anchors and pulling the rope

During the anchoring process, first throw the top anchor and then throw the middle anchor; similarly,first pull the top cable and then pullthe middlecable.

4.1Throwing the concrete anchor

When the concrete anchorhas been towed to the specified sea area,the sea surface position corresponding to the anchorposition can be found usingGPRS,and the operating shipwill stop.Two divers should standon the two adjacent anchoring platforms tiedtogether,and usea sawtooth cutterto quickly cutoff thetworopesconnecting theplatformsand the concrete anchorat thesame time.At thispoint,thetwoconcrete anchors will sink to the seabed almost simultaneously.Because the density of the anchorrope is less than that of sea water, the other end wilfloat on the seasurface,asshowninthefollowingfigure:

After dropping the concrete anchor at an anchor position, the operation ship tows the anchoring platform to move on. When it reaches the next anchoringpoint,it repeats the anchoring action.

4.2Pulling the apex cable

Afterthrowingfourvertexconcreteanchors(that is,8 anchors in the 4 positions corresponding to the 4 vertex angles of the main rope).To reduce anyinconsistencyincablepullingcausedby anchorpositionerrors,pullallfourapexcables at this time.The operating procedure is as follows: Sailthe ship to the sea surface corresponding to the anchorpoint,afterwhich an operator onthe ship will use a long-handled pull hook to pick up oneend of thecable and tieit to the side of the ship,as shown in the following figure:The rope is thentransportedtotheconcreteanchor anchoring area.Seethefollowingfigure:

Theboat should first travel to the apexposition closest to the main rope,and the rope then handed to the diver.Afterpassing one end of the cable through the tethering ring of the main rope, the diver hands it to the operator to tieit onto the boat. Sailthe boat in the opposite direction. As it movesforward,the cableswill create tension in the cage frame.Untie the cable from theboat. Thedivershouldfastenthecable tothemain rope, and cut off any excess mooring rope for recycling,asshowninthefollowing figure:

4.3Throwingthemiddleanchor Repeat the actions and method described above when throwing thevertex concrete anchor.

4.4Pulling the middle cable

Repeat the same steps and method for pulling the apex cable.

5. Hanging the iron pendant

Leave a certain buffer between the cable and the main rope for the Lesso cage anchoring configuration to protect the cage from offseting part of the external force when it is hit by strong winds and waves; due to the length of the cable, the angle of inclination will be small. Therefore, when allcables have been tightened, the mainrope and the frame rope willbe kept away from the sea surface or floating on the sea surface, as shown inthefollowingfigure:

This creates great inconvenience to fishermen when they sail to the cage for feeding and maintenance. Therefore, iron pendants need to be attached to the connection points of the main rope and the cable (that is, the apex and the middle point) and to the middle and upper parts of the cable,withallcablesthensunkintothesea.

5.1 Tying the iron pendant in place

The ironpendant weighs about 20k\mathfrak{g} and lookslikea weight.Tie one end of therope with a diameter of 15\mathsf{mm} in advance,and put it on the operating boat,as shown in thefollowingfigure:

5.2 Hanging the iron pendant

The operating procedure is as follows: Maneuver the boat to the top or middle point of the main rope, drop the 3-claw hook, hook up the cable, and secure it to the iron pipe along the boat. Continue to sailthe ship towards the cage until the connection point between the main rope and the mooring rope touches the side of the boat. At this time, tie the rope that is attached to the iron pendant to the connection point, as shown in the followingfigure:

Move the boat backwards, and tie an iron pendant again at the middle and upper position of the cable. Finally, throw the cable into the water. Each connection point between the main rope and the cable should be tied with an iron pendant. Increase the number of iron pendants in the middle and upper part of the cable as required,though there should be no fewer than one.No ropes should be visible inside the cage system after hanging the iron pendants. At this time, the cage anchoring system is now installed, as shown in the following figure:

Part IV: Instructions for Use

I. Requirements for Agriculture Sea Areas

1.Sea area

In government-planned cultured ocean areas,choose a bay,oranopenorsemi-opensea area away fromestuaries,sewage outlets,ports,and waterways,and withlowwind and waves;avoid frequent typhoons,floods,and red tides.lt is advisabletochoose a sea area with island and reef barriers, light winds and waves,smooth water flow,flat seabed terrain,muddyor sandyseabed,water depthof 10-20m,seawater flowrate of lessthan 1.0m/s and witha straight and stable tide.Theflowvelocity in thecagewillbeless than 0.8m/s oncemeasuressuchasflowblocking and diversion are implemented. The cages must not be deployed in waterways, restricted or military areas, or waters where such products cannot be deployed due to local laws and regulations. Cage deployment shall comply with, but not be limited to, the following standards: GB/T18407.4 Environmental Requirements for the Safety,Quality and Pollution-Free Application of Agricultural Aquatic Products.

2.Sources of pollution

There should be no sources of pollution located inside or upwind of the aquaculture area that could pose a threat to the culture environment. There should be no direct industrial "three wastes", agricultural or domestic pollution sources around the culture area, and there should be a supply of freshwaterfor living and production.

3.Environmental impact

The deep-water cage culture will not have an impact on the surrounding environment, whether it be in terms of appearance or the ecological impactofcultureactivities.

4.0cean environment

The seabed should be smooth without too much of a slope. The bottom of the seabed should be mud, silt, sand or rocks. The tides should be smooth,withaflowvelocityof 0.3m/s~0.8m/s and a water depth above 8m at low tide.The distance between the bottom of the cage and the seabed shouldbekepttoatleast3m.

5.Cage layout

Depending no the size of the cage, the tides, the wind and waves, it is advisable to use a single cage as a unit; the distance between cages (including cage groups) should not be less than 120m. The cage must not obstruct any waterways. The total area of cages should not exceed 7% of the aquaculture sea area.f conditions permit,select three aquaculture waters.One should beused forculture,with the othertwosetaside as spare culturewaters;asystem of rotating days off can thenbe implemented.

Il. Precautions

Illustrationof commercialmarkincludedinpipes'sandfittings publicity materials:

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