1, personalized signature, calligraphy and painting appreciation: Since the Tang and Song Dynasties flourished in the Tang and Song Dynasties after the Yuan Dynasty, people began to put seals on calligraphy and painting works as Tibetan seals, but it has not yet formed a trend. At present, many seals on paintings and calligraphy works before the Song Dynasty were printed by later generations. After the Yuan Dynasty, the seal gradually became the object of appreciation and collection of calligraphy and painting works, equivalent to the current autograph, and even gradually became a form and atmosphere of artistic creation. Emperor Qianlong of the Qing Dynasty liked to stamp all kinds of private seals on ancient books, calligraphy and painting to express his love for painting.

2. Stamps are used as stationery printed on documents to show identity or signature. Generally, seals should be dyed with pigments before printing. Those that are not stained with pigment and will appear concave and convex after being printed on a flat surface are called steel seals, and some are wax prints printed on wax or wax paint or envelopes. Made of jade, metal, wood, stone, etc. Seal is one of the representatives of China traditional culture.