the ancient jade of the Shang and Zhou dynasties is generally simple and generous in shape, but it gives you the impression that the carving is not very fine, but it will be very vivid. In terms of shape, the characteristics of jade articles in Shang and Zhou dynasties are more obvious. The pattern decoration technology of jade articles in Shang and Zhou dynasties uses carving techniques such as "sprinkling", "shallow relief", "reducing ground" and "pressing the ground" to shape the shape and outline of jade articles, and express the detailed features of jade articles with yin and yang lines. In general, its jade articles show such characteristics, but at the same time, it should be borne in mind that some fake Shang and Zhou jade articles imitate this technique to deceive collectors. In the selection of jade articles, Shang and Zhou ancient jade used a lot of Kunlun jade. "