Among many kinds of tea, green tea is most suitable to be stored in refrigerator, especially tea with strong aroma like Longjing. If the storage time is short and you need to drink it at any time, you can put the green tea in the freezer and adjust the temperature to about 5℃. If it is unopened and you want to keep the tea for more than one year, you should put it in the refrigerator. In addition, the fragrant Tieguanyin must also be kept in the refrigerator, because this kind of tea has low fermentation degree and is easy to deteriorate. Tea leaves such as black tea, Pu 'er tea and scented tea don't need to be kept in the refrigerator. Because black tea belongs to fermented tea, the content of tea polyphenols in tea is small and easy to preserve; Scented tea has a strong floral fragrance, but low temperature storage will inhibit its fragrance and reduce its freshness and concentration. Pu 'er tea belongs to post-fermented tea, which contains beneficial bacteria. Enzymes need to be ventilated, cool and dry to play their role. Therefore, keeping tea in a ventilated and dry place at room temperature is the correct way to preserve Pu 'er tea.