It would be better if the lid was sealed. According to relevant data, the selection of sealing ring material is of great significance to its sealing performance and service life. The performance of the material directly affects the performance of the sealing ring. Stir-frying is one of the common cooking methods of Chinese food. It refers to the cooking process of putting one or more dishes into a special concave pot, taking the heat transferred from fire to the iron pot as the carrier, adding oil, seasoning and dishes, and then frying the dishes with a special tool spatula.