2. Japan is a springboard for crayfish to enter East Asia. By the 1960s, crayfish had been found in Japan, including Hokkaido, except some islands. Even the Japanese relative of Procambarus clarkii, the Japanese black crayfish, was almost killed by it.
3. In the early 1990s, crayfish quickly boarded the tables of vendors in Hubei, Anhui, Jiangsu and other places. Crawfish vendors counted the money, embarrassed and looking forward to going to the international market.
4. In order to adapt to the harsh living environment, crayfish have undergone strange evolution in China, and have mutated into new varieties such as spicy crayfish, fennel crayfish and steamed crayfish.