How long is the shelf life of tea?

General green tea and green tea series (including Tieguanyin, Wuyi Rock Tea, Taiwan Province Frozen Oolong, Guangdong Phoenix Narcissus, Fenghuang Danzong, Zhangping Narcissus, Yongchun Fingered Citron and other semi-fermented teas) should be sealed, refrigerated or frozen in the dark, and can be preserved for more than one and a half years; Black tea series, as long as it is sealed from light and moisture, will not deteriorate basically, and with the extension of time, the substances contained in black tea can be transformed and the taste will become better. Tieguanyin is mostly slightly fermented, so the shelf life will not be too long, usually about three months, and it is best to drink it in one to two months. However, if it is sealed in vacuum and stored at 3-5 degrees, the shelf life will be as long as two years. If it is taken at room temperature, it should be drunk as soon as possible. Put the skins together to make old tea, and finally drink them together to make herbal tea. Tieguanyin bought in the market adopts vacuum compression packaging. Generally, it only needs to be stored in a cool place and protected from light for a long time. The effect of MINUS 5 degrees is better, but it is not recommended to drink it for more than one year, and it is best to drink it within half a year.