Some components in tea are unstable, and under certain physical and chemical incentives, it is easy to produce chemical changes, which is commonly called tea change. Poor preservation conditions of tea will accelerate the self-oxidation and mildew of tea.

Tin bottles, porcelain jars and colored glass bottles are the best containers for tea preservation. Secondly, tin cans, wooden boxes and bamboo boxes should be used, among which bamboo boxes should not be used in dry north. Plastic bags and cartons are the worst. The container for storing tea leaves should be dry, clean and free of peculiar smell.