If you put 1200 crab seedlings in an acre of water, the hairy crabs will be small and medium-sized; If you put 700 crab seedlings, the specifications will be larger. However, last year, the weather was suitable for raising large crabs, and 500 crab seedlings were put in an acre of land, and finally they all grew to about 4 Liang; The number of crabs released per acre 1000 has also grown to about 4 Liang, which makes many farmers feel lucky this year. As a result, most of the Yangcheng Lake hairy crabs released this year are small-sized, resulting in a surplus of small-sized hairy crabs and a shortage of large-sized ones.