There is a certain amount of pressure in calligraphy and printing. Not all seals can be stamped. Seals play an important role in the exchange and transmission of ancient official documents and in the identification of the authenticity of calligraphy and paintings. They are the most important symbol of the authenticity of calligraphy, paintings and documents. Nowadays, seals are mostly used as decorations in calligraphy and painting works, and are also necessary cultural supplies for authors to create calligraphy. Seals not only play a role in identifying the authenticity of works, but also represent the scientific layout of calligraphy works and a style of cultural taste. Seals usually come in the following types: name seals, Zhaihao seals, and introduction seals, which are also the most commonly used seals in calligraphy and painting works.

The most common badges are two, one red and one white. If the font is recessed and the seal is white, it is called a white seal. If the font is convex, the seal has red lines, and the other parts are concave, the seal is called Zhuwenyin. Generally, name seals have various styles. Names can be divided into "surname seals" and "name seals". The two are of different sizes and match red and white. They are often used at the end of calligraphy works. They are also called "dual seals" to give people a sense of belonging. More visually interesting. Zhai Zhang no. "Zhaihaozhang" is also very common in calligraphy and painting works. The text content of the Zhaihao. Zhang usually uses the author's elegance names such as calligraphy (painting) room, pavilion, study room, balcony, screen pavilion, guild hall, and mansion. Most calligraphers and painters have fasting seals in case of emergencies, at least one side, sometimes several, or even more.

The first chapter is often placed between the first and second characters of the first line at the beginning of the text of the calligraphy work. The shape is mostly rectangular, but also circular, semicircular, oval, and oval gourd-shaped. According to the needs of calligraphy layout, it is used on the right side of the first two or three characters of the book title, so it is cited as the first chapter. Sometimes, the tail stamp of the work is too heavy and needs the word "upgrade". If a monotonous seal needs adjustment, a first seal should be considered.

Xianzhang is relatively common in ancient calligraphy. The purpose of the leisure chapter is to add calligraphy style, highlight the style, avoid the monotony of black and white paper and ink, and add some stones and stones. The content of leisure chapters is relatively complex, including famous aphorisms, proverbs, personal speeches, etc. It is mostly used to fill in the blanks and "break shapes" to adjust the layout balance of calligraphy works. The number of such chapters is more or less, ranging from dozens or even hundreds. There is also a highly decorative artistic seal, which contains auspicious words such as "longevity and longevity", "blessings such as the East China Sea", "immortal wind bone", etc., or is engraved with animal shapes, such as green dragon, white tiger, rose bird, Xuanwu, etc. Also used by calligraphers.