The main raw materials of tofu are soybean, water and edible salt. And tofu is rich in protein, which is easily eroded by bacteria. Tofu stored overnight will breed a large number of bacteria, leading to deterioration, so tofu can not be eaten after heating overnight.

Tofu contains a variety of trace elements necessary for human body, and is also rich in high-quality protein, which is known as "vegetable meat". In 20 14, "traditional bean curd making skills" was selected into the fourth batch of national intangible cultural heritage representative projects in China, and this magical China cuisine began to be endowed with more cultural connotations and inheritance significance besides commodity value.