After the soybean milk is boiled, a natural oil film is formed on the surface, which is picked up and dried to make bean curd skin, also called "oil skin", "yuba", "bean curd skin" and "bean sprouts".

Second, the pressed tofu skin (thousand pieces, dried tofu) is similar to dried tofu, but thinner (thicker than the oil skin, which can be regarded as ultra-thin dried tofu), slightly dry, and sometimes salted, which is different from the taste of tofu.