Pond conditions. The area varies from10 ~ 30 mu, and the pond is rectangular, with a water depth of 0.6 ~1.8 m, and the depth varies from place to place. The bottom material is preferably clay, sandy soil or sub-sandy soil to help the hairy crabs in Yangcheng Lake dig holes, and the water near the source of the pond is not polluted, so it is convenient for water injection and drainage. "The pond is preferably made of stone walls or cement slabs, which can prevent escape without making Yangcheng Lake big. It can be used in the pond. Artificial caves. Yangcheng Lake hairy crabs often lose the ability to resist the external environment when molting. "When the bait is insufficient, they will kill each other, which will affect the survival rate and yield. Therefore, it is necessary to artificially create a secluded cave environment or make its dispersion density in the water as uniform as possible." At present, mesh or bamboo foil is commonly used to separate the water body to achieve uniform density. "The exposed part of the mesh and bamboo foil is added with nylon mesh to prevent climbing over the boundary." Bricks, tiles, willow roots, brown chips and reeds can also be used as the caves of Yangcheng Lake hairy crabs. Escape prevention facilities. Escaping prevention is one of the key technologies of hairy crab culture in Yangcheng Lake. Generally, there is a stone wall or cement slab wall, which is 60 ~ 1 00 cm higher than the pond ridge, and a "factory" shaped mouth with a mouth width of 25 ~ 30 cm is added. The junction of the pond wall is made into an arc shape to prevent hairy crabs from climbing in Yangcheng Lake. "The mouth material is glass, tin sheet or cement slab" can also be inserted around the pond. Cover it with a net (the net covers the bamboo foil at an angle of 45). "Nylon film or polyester plastic plate can also be used as an escape wall. It is required that the film is 60 ~ 80cm higher than the ground, and the film should be buried in the mud for 20 ~ 25cm to enhance the firmness. The film should be spread with bamboo poles or wooden sticks every half meter or so to form an escape wall." In addition, the water inlet and outlet should be blocked with a net or barbed wire. Clear the pond. The methods of pond cleaning and water inflow are the same as those of seed cultivation. "If the pond cleaning time is too early, you should pull a net to clear the field before releasing the seeds.

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