9. Pu-erh tea and black tea

Pu-erh tea and black tea are representatives of fermented teas. Unlike green tea, they undergo long-term fermentation and aging, which usually makes them more mellow and even gives them higher collectible value.

The "expiration" of Pu'er tea and black tea does not mean that they have lost their value. On the contrary, over time, the taste of these teas may become more complex and richer.

Some Pu-erh teas, when stored in a suitable environment for many years, can even become rare and precious products with unique flavors.

Expired Pu-erh tea can still be consumed if stored properly, provided that the tea leaves are not moldy, have an off-odor, or are excessively oxidized.

In fact, some tea lovers believe that Pu-erh tea and black tea get better over time, especially when stored properly, their flavors gradually become more mellow and complex.

This also explains why many tea collectors are willing to preserve some aged Pu-erh tea for a long time, as their value and taste continue to appreciate over time.

Even after the expiration date of Pu-erh tea or black tea, as long as the storage environment is good and the tea leaves are in normal condition, they are still very good teas worth tasting.