The reason why the bitter and astringent taste of Pu'er tea "does not dissolve"? Where does it come from? This starts with the ecology of the tea trees. Based on our years of research in tea mountains, we first distinguish the ecology of tea trees: there are original ecological ancient tea gardens; newly developed tea gardens; terraced tea gardens; those that use chemical fertilizers, spray pesticides, and apply herbicides; and those that do not.

In the tea gardens, we taste the fresh leaves and find that those with chemical fertilizers, pesticides, and herbicides have a bitter and astringent taste that does not dissolve, accompanied by feelings of chest tightness and irritability. In contrast, the original ecological ancient tea gardens have a bitter taste that can dissolve. Upon closer tasting, we find that the bitterness of the former is dead and solid, while the latter (ecological ancient tea garden tea) is cool and open.

The bitterness of the two is different: the former cannot dissolve and causes discomfort; the latter can dissolve and brings comfort. The bitterness of the former comes from chemical fertilizers and pesticides; the bitterness of the latter comes from the tea itself.