There is a rumor on the Internet: "The Japanese biochemical troops stationed in China have to deal with a large number of corpses, and they have turned crayfish into crayfish through a series of genetic modification, and transported them to the Japanese military station to clean the water." This theory

The method is quite absurd. Watson and Crick discovered the double helix structure of DNA in 1953. In the 1970s, human beings began to study the application of DNA recombination technology. It was simply impossible for the Japanese invaders to carry out genetic modification.

Tan.

However, the crayfish we are eating now are indeed from Japan. 1927, Japan introduced 20 Procambarus clarkii from the United States, with the aim of breeding and cultivating them as feed for bullfrogs. Around 1930, Kjeldahl

Procambarus clarkii was introduced to China again. The earliest breeding place was near Nanjing, and it was probably also used as feed. After that, Procambarus clarkii thrived everywhere with its good adaptability. So from the time point of view, crayfish are entering.

China has nothing to do with Japan's invasion of China, and there is no conspiracy theory. -shell net