The country currently does not have clear regulations on the shelf life of mooncakes. The shelf life of various mooncakes on the market is set by each manufacturer. Different brands of mooncakes have different shelf lives. The longest shelf life is 90 days, the shortest is only a dozen days, and some are marked 45 or 60 days. The shelf life of mooncakes is restricted by many factors such as raw material quality, production environment, production equipment and packaging technology, especially the impact of production environment and packaging materials on the shelf life. Modern factories operate under sterile conditions, eliminating sources of pollution. Therefore, mooncakes produced and packaged in this environment have a longer shelf life. Although hand-produced mooncakes can meet hygienic conditions, they cannot be sterile and will be more or less contaminated with bacteria. Therefore, even if they use the same packaging, the shelf life will be shortened.