1, geographical location: Kunshan hairy crabs are produced in Kunshan City, Jiangsu Province, and Yangcheng Lake hairy crabs are produced in Yangcheng Lake area, Suzhou City, Jiangsu Province.

2. Appearance characteristics: Yangcheng Lake hairy crabs are big, with dark yellow or orange-brown crab shells, full crab paste and tender and smooth meat. Kunshan hairy crabs are relatively small in size, with reddish-brown crab shells and light cream Huang Lue.

3. Water quality environment: Yangcheng Lake, the birthplace of hairy crabs, is one of the three largest freshwater lakes in China, with excellent water quality, unique ecological environment and good growth conditions. Hairy crabs in Kunshan grow in lakes, rivers or farmland in the urban area of Kunshan, and the water quality is slightly different from that of Yangcheng Lake.