The bamboo tool for adjusting the pot body is called a grate. Using the arc of bamboo, the arc that conforms to the outer contour of the pot body is trimmed with oblique chisel and file. When in use, put the pot body on the wooden turntable, drag and press the pot body clockwise with the grate to make the pot surface smooth and regular.
Stick the neck of the pot on the pot and call it a big one. Bigfoot refers to connecting the pot foot ring with the pot body. On the sub-mouth, it is to connect the lid with the sub-mouth.