Button carving refers to the carving of the buttons on the upper part of the seal. It belongs to the category of round carving and has a rich three-dimensional sense. However, compared with round carving, it has three significant characteristics. First, the image is small, limited to the size of the seal, which is generally less than 10 cubic centimeters; The second is to show only the upper part of the object, rather than the round sculpture, which needs all-round performance; In addition, the performance content of button carving is mostly animals, especially animals in ancient legends, such as chi, lion, dragon, tiger, exorcism, taotie, etc. Therefore, button carving is also called "animal button". The history of button carving is linked with seals. Only seals can make buttons. According to relevant historical research, the earliest seal started in the Zhou Dynasty, more than 3000 years ago. The original seal is a symbol of power and status, and is a special item for princes, generals and ministers, and Dada dignitaries. The original seal button was also very simple and simple, just drilling a small hole on the top of the seal to wear strong ties for carrying, so the seal button is also called "seal nose". With the continuous development of history, a strict hierarchy has emerged in the materials and buttons of seals according to the different positions and official titles of users. For example, the official seal of the Qin Dynasty, in addition to using gold, silver, copper and other materials to distinguish the level of the officials, also distinguish the decoration of the buttons. In the Han Dynasty, the emperor used tiger buttons with jade seals, the crown prince, the lieutenants, the prime minister, the lieutenant, the sangong, and the left and right generals used gold seal tortoise buttons, and the officials of the two thousand stone Dai Lu used bronze seal elephant buttons Since then, the buttons used by all dynasties, from the monarch down to the officials of various products, were mostly chi, lion, dragon, phoenix, tiger, exorcism, taotie, unicorn, camel, bird, claw, bear, bat and other animals in the zodiac, depending on their positions.

Shallow relief has a low rise, a large compression of shape, a strong sense of plane, and is closer to the form of painting to a greater extent. It does not rely mainly on physical space to create space effects, but uses more painting techniques or perspective, illusion and other processing methods to create more abstract compression space, which is conducive to strengthening the dependency of relief suitable for the carrier. The ancient Assyrians of Mesopotamia were probably the artists who were best at performing art by this means. In a series of "Assyrian Hunting Pictures", they used the technique of bas relief very well to express the lively artistic image with a sense of rhythm and rhythm, and to show the inner feelings of the characters and animals with complex dynamics. The selection of the compression degree of relief space usually takes into account the function, theme, environmental location, light and other factors of the performance object, of which the environment and light factors play a decisive role. Excellent sculptors can always handle these relationships well, so that the works can achieve good visual effects.

From the perspective of development, sculpture can be divided into traditional sculpture and modern sculpture. Traditional sculpture is a visual, tactile and static three-dimensional art form molded with traditional materials; Modern sculpture uses new materials to make anti traditional four-dimensional, five-dimensional, acousto-optic, soft and dynamic sculptures. According to traditional materials, and according to environment and function, it can be divided into urban sculpture, garden sculpture, indoor sculpture, outdoor sculpture, desk sculpture, shelf sculpture, etc. There are many kinds of sculpture materials, such as clay, stone, wood, metal, gypsum, resin, ivory, etc. Then several categories were developed: wood carvings: wood carvings have a long history. Most of the early themes were centered on religion. In addition to religious icons, they were also used for the decoration of altars and religious places. In countries where wood building flourishes, wood carving develops with architecture. Modern wood carvings have quite diversified styles and features, and artists like to use abstract forms to express them. In addition, wood carving is also an important contributor to the invention of printing. Please see woodcut prints for details; Stone carving: The regions where stone carving is developed have a lot to do with where the stones suitable for carving are produced. The regions where stone carving is developed have a long history of stone carving. In the past, stone carvings were often used as decorations of gardens, signs of doorways, or architectural decorations of mausoleums. Because the stone is thick (not easy to be stolen), and the details of carvings are not easy to be damaged by wind and rain, stone carvings are mostly in outdoor environments. The common stone carving material is marble. There are clay sculptures, ice sculptures, sand sculptures, metal sculptures and pottery.

Most of the jades mentioned in daily life refer to nephrite, and there are many kinds of nephrite products. Generally, they refer to white sheepskin jade, white jade, topaz, purple jade, black jade, jasper, sapphire, ruby and northeast Xiuyu produced in Xinjiang. cost performance GRC component processing In the jade carving, the white jade with sheepskin is fine in texture and strong in luster, as white as sheepskin, which can be called "the king of nephrite" and "the crown of white jade". In addition, Nanyang jade, Lantian jade, Hotan jade, agate, crystal, coral, turquoise, lapis lazuli, etc., all belong to the category of nephrite. Later, due to the opening of the Silk Road, the jade produced in Hotan, Xinjiang, was unanimously recognized and began to play a leading role in the processing of royal, official and folk jade. GRC component processing manufactor Nephrite gradually evolved into a synonym for hotan jade.