Author, place of origin, age, calligraphy is required to be refined. The fonts are mostly regular script and official script. Ruqing, Wu Changshuo, whose original name was Junqing, whose original name was Cangshi, was from Anji, Zhejiang, and was commonly used in signatures (Anji Wucangshi). Writing down the year and month on the painting, signing your name and alias, and stamping it with a seal are called "money". Some inscriptions also record the place of birth, age, place of painting, etc. If the work is a gift, the recipient's name, title, greetings, modest words, etc. must also be written. The content and format vary widely. Styles, in addition to changes in fonts and font shapes, can be divided into two categories: (single style) and (double style). 1. Short payment: simply sign your name or year and month, no more than a cross. 2. Double style: that is, in addition to the single style, the name, title, official title, tribute and other words of the recipient of this work are added. Taboos on inscription: 1. Inscriptions and seals on calligraphy and paintings should not be larger than the characters. 2. The seal should be stamped directly under the inscription and straight down to the bottom corner. No additional corner-pressed stamps are allowed. 3. When signing the chess piece, there should be no free stamps on the left and right corners. 4. Rectangular, round, and oblong seals cannot be placed in the lower corners of square seals. The square seal cannot be placed on the blank space at the top of the calligraphy and painting. 5. When signing a traditional Chinese painting in a straight frame, the characters at the end of each line should not be neatly aligned with the length of other lines.