If your braised duck goes bad after two days in the refrigerator, there may be several reasons: First, the merchants use expired or inferior ingredients; Second, the preservation environment is not suitable, such as excessive temperature or humidity; Third, the processing is not in place and the duck meat is not cooked; Fourth, the storage time is too long. It is recommended to carefully check the shelf life before buying ingredients and choose a regular brand; Avoid high temperature and humid environment during storage; At the same time, pay attention to the cooking process to ensure that the ingredients are completely cooked; Finally, don't eat some perishable foods with a long shelf life.