Later, jade shovels were unearthed in Dawenkou culture (which began in 4300 BC and was transformed into Longshan culture in about 2400 BC), jade spears with animal faces were unearthed in Rizhao, Shandong Province, and jade knives, yufu and jade shovels were unearthed in Dantu Village, Wulian. They were not practical tools, but only the shapes of production tools. Very rich and exquisite jade articles have been unearthed from Neolithic cultural sites in Taihu Lake area in the south of the Yangtze River. From Hemudu culture 7,000 years ago to Liangzhu culture 4,000 years ago, it lasted for 3,000 years. Among them, Jun, Huang, Guan and Zhu were unearthed in the third layer of Hemudu culture (about 5000 BC); Jue, Huang, ring, bead, bracelet, tube, pendant, hairpin and axe were unearthed in Majiabang culture (4500- 3500 BC). In Liangzhu culture (about 3500 BC-2000 BC), bamboo slips, rings, bracelets, beads, tubes, pendants, cones, needles, bamboo slips, jade cicadas, pendants, Zhang-shaped vessels, spinning wheels, shovels, axes and pendants were unearthed. According to the chronological order, we can clearly see the development law of jade articles in Taihu Lake area: the types are from less to more, the shapes are from simple to complex, the individuals are from small to large, and the production is from coarse to fine. From the location of unearthed jade articles and the analysis of pre-Qin documents, we can see that some jade articles have been endowed with complex social concepts.

Twenty-four jade articles were unearthed from Liangzhu cultural tombs in Miaodun, Wujin, Changzhou, Jiangsu Province. The most exquisite jade is placed on the abdomen of the deceased, another on the chest, and the rest on the back of the head and front feet. 33 jade cong were unearthed, 1 bracelet jade cong were placed on the upper right of the head, the remaining 32 square-tube jade cong were placed in front of the head, 4 were placed behind the feet, and the rest were all around human bones, most of them showed signs of fire. There seems to be a religious ceremony at the funeral. Burning jade jade and jade cong may be out of a polite and rude intention, at least it is certain that jade jade and jade cong were buried with the tribal chiefs of the patriarchal clan. "Li Zhou Guan Chun Zong Bo" has a cloud: Li Tian and Cang Bi, Li Jue and Huang Yan. Chiefs of primitive tribes have the privilege of respecting heaven and land in their lives. Jade jade and jade cong, as symbols of their status, are also used reasonably by future generations, although their connotations are not necessarily the same.

With the continuous progress of society, jade has been endowed with more and more complex social concepts, and its connotation beauty is highlighted. 197 1, a jade dragon unearthed in sanxingtala village, Wengniute banner, Inner Mongolia, 1982, and a jade with the shape of a dragon head unearthed from Hongshan Culture building site in Dongshanzui, Kazuo county, Liaoning province, are all important discoveries. As a totem, the dragon is a symbol of the ethnic group with China as the main body, and will later become a symbol of the whole Chinese nation. The image of dragon appeared in primitive society in China, such as the giant fish pattern on painted pottery in Qinghai, which is actually the dragon pattern. Painted pottery panlong plate unearthed from Longshan cultural tomb of Taosi in Xiangfen, Shanxi. Jade Dragon unearthed in Tara Village, Sanxing is dark green, 26 cm high, curled into a C-shape, with a long head, a long mouth, a nose protruding forward, an upturned edge, a truncated end face, two nostrils side by side, and a long neck ridge. It is a variation of pig head. The appearance of Yulong with pig head as its basic feature has given us new enlightenment. The origin of dragons should be related to primitive agriculture, because pigs are the most important livestock in primitive agriculture. This big jade dragon is carved with a whole piece of jade material, and the details are embossed and bas-embossed, which is smooth and round. The dragon body is vigorous, long and lofty, full of vitality, which shows the vigorous vitality of the dragon totem nation. The dragon has become the intermediary of some social concept.