Qi Baishi’s seal was never used once. Qi Baishi's seals were used repeatedly. The seals fully reflect the development trajectory of Qi Baishi's seal cutting art and the formation process of his seal style. Among them, the seals with a large number of words and phrases carved in his seventies and eighties are typical. This year, I came to the Beijing Academy of Fine Arts to sort out and identify the three hundred square stone seals of Qi Baishi.