Unofficial personal seal refers to seals other than engraving names, dining rooms, officers, and seals. From the lucky words Seal of the Qin and Han Dynasties, in addition to the engraved llucky language, poems, maxims, and self-discipline are often engraved. Artists specializing in engraving and painting often have many seals.

Many of these seals, except for the name and size of the chapter, the rest of the seals are collectively referred to as "small chapters" in the printing.