White mold appears on top of the pepper. It is found that the red pickled peppers appear abnormal sour odor, then it proves that the red pickled peppers have gone bad. During the process of pickling the peppers, bubbles appeared in the soup inside, at this time it also indicates that the red pickled peppers have gone bad. Found some white mold on the top of the red pickled peppers, indicating that the uncleanness of the pickling container will also lead to the deterioration of the pepper.