3-5 days. The tenderloin cake should be stored in a ventilated and dry environment, and the packaging should be kept intact to prevent flying insects from entering. If it is kept in the refrigerator for 3-5 days, it will go moldy and deteriorate after more than 5 days, so the tenderloin cake can be kept for 3-5 days. Pork waist cake is a traditional snack in Anhui Province, which originated in Huaibei City, Anhui Province.