Buy crabs, put them in a deeper pot, put some fine sand in the pot, and pour in water without crab shells. The water should not be too deep, otherwise the crab will die of lack of oxygen. If you use tap water, you need to put it in the sun for a day before using it. Crabs are omnivores. They can be fed with red nematodes, egg yolks, small fish and shrimps, and occasionally grass and the internal organs of chickens and ducks. Be careful not to feed too much.

Eriocheir sinensis often burrows in mudflats of rivers, lakes and swamps, moves at night, feeds on fish, shrimps, animal carcasses and grains, often migrates to estuaries every autumn to lay eggs, and hatches in March-May the following year. Its meat is fresh and tender, and it is a popular food.