1, paper bottles can't be drunk after opening. If it is unopened and the tea is not wet, it can be drunk even if it expires for a period of time, which has little effect on the quality of tea. The premise of how long tea expires is preservation, and then the shelf life of all kinds of tea.

2. For example, green tea takes about 12 months, black tea takes about one to two years, and oolong tea takes about two years. After this period of time, it is basically expired tea.

3, the tea is not well sealed, and it is easy to absorb water and get wet. This kind of tea will go bad faster. If the quality of tea changes after the expiration date, don't drink it. Health is the first priority.