According to Guangzhou Daily, no matter how hot the weather is, Xiao Li (a pseudonym) , a 20-year-old rural Anhui girl, always wears long sleeves and long pants, and hides her hands under the clothes. On the 17th, in front of the doctors at Guangzhou Skin Disease and Venereal Disease Prevention and Treatment Institute, Xiao Li timidly stretched out both hands. It could be seen that the skin on her palms was thick and hard, like being covered by a layer of whitish "fish scale" with honeycomb-like dimples and serrated edges of the fingers. Moreover, the thumb on her right hand was actually two fingers sticking together