Why does Pu 'er tea lose its tea flavor if it is kept for too long?

Pu 'er tea can be stored for a long time. As long as it is properly kept, it can be easily preserved for decades. Usually keep it in a cool, dry and odorless place, and don't talk to some odorous things, such as cigarettes and perfume. Ventilation is needed when the weather is good, and attention should be paid to moisture prevention in rainy days. Don't be exposed to the sun. Pay more attention. In that case, it won't be bad for a hundred years, but under normal circumstances, Pu 'er tea is best stored for about 15 to 20 years, when it is completely fermented, with the best taste and the most delicious taste! After further storage, although the tea will not deteriorate, it will continue to age and slowly lose a lot of charm. There was only a little tea flavor left in the end.