Hehe, beef tripe, beef tripe, pork tripe, large intestine, yellow throat, sheep tripe, beef tendon and other meat products. Use caustic soda (sodium hydroxide, food-grade sodium hydroxide can only be used for cleaning and disinfection of tools and equipment in food processing), formaldehyde (formalin), hydrogen peroxide (hydrogen peroxide, food-grade hydrogen peroxide can only be used for cleaning and disinfection of tools and equipment in food processing) and other non-edible. QS certificate compound food additive can be used legally and standardly, with complete three certificates, food safety, crisp and juicy taste, high yield and no shrinkage in cooking.