This method is suitable for experienced pot friends, because the sound of the pot depends on many aspects, such as the type of pot, the thickness of the pot, the thickness of the mud, the temperature of the kiln, the tightness of the mud, the old and new degree, the location of the tap and so on. These factors will affect the crispness and treble of the pot. For the reference of pot friends, the higher the number of mud, the clearer the sound when knocking, while the lower the number of mud, the duller the sound when knocking.

This is because the mud particles are fine when the mud mesh is high, and the sound is crisp when the mud is dense, such as porcelain. The pot made of low mud net is a bit dull when the mud net is relatively low, which means that it is breathable.

The sound is slightly different when the pot is struck with different carcass thickness. When the carcass is thick, the sound is slightly heavier; While lean carcasses are relatively brittle. I have to say, don't knock on the teapot at will, others' pots will be broken if they are not careful, especially novices.