Tea varies, and so do the methods of drinking it. They need to be discussed separately.

Claim 1: The first infusion doesn't taste good anyway, so discarding it doesn't matter.
This statement mainly refers to the warming and moistening aspect of the first infusion, believing that the "warming rinse" has not reached the optimal drinking taste, so discarding it is fine. However, for some lightly fermented teas, the beneficial substances are most fully released in the first infusion.

Claim 2: The first infusion is used to wash away impurities and dust.
This claim applies to teas that have been aged for some time, such as the beloved Pu'er tea. The first infusion can indeed serve as a rinse, so it doesn't need to be drunk. Don't feel it's a waste. Pu'er tea is unique: the first two or three infusions are for waking the tea, the fourth and fifth enter its prime, and after more than ten infusions, it gradually fades.
Endless tea meanings, unfathomable life.