It's best not to drink. Because there is a small amount of protein in tea, the organic matter such as protein will rot and deteriorate if the tea is stored for too long, which is harmful to the health after drinking.

Although you can't drink Pu 'er tea overnight, don't throw it away. You can put it in the teapot to collect money. There are also some purple sand ornaments, purple sand pots and purple sand cups, which can be used to raise purple sand.