Pure heart is 1. Let the atmosphere calm down. Step 2 meditate. You can understand that drinking tea has a refreshing effect, but in general, drinking tea is a feeling of enjoying a calm mind, so it is said that the heart is clear.

Generally speaking, it doesn't make much sense, because sometimes you can buy a teapot and let him engrave words on the spot with a computer. Although this looks hand-carved, it is usually the sculptor who chooses it according to the size of the pot. Of course, sometimes others ask for it.