Kunlun jade and Daqian jade contain many trace elements such as selenium, zinc, copper, cobalt and manganese. Wearing jade for a long time, trace elements that are very beneficial to human health are gradually absorbed by the human body, maintaining the balance of various elements in the body, and can really play a role in getting rid of diseases and strengthening the body.

Tuojiang Daqian Jade, also known as Daqian Jade, Changhong Jade, Tuojiang Jade, Daqian Seed Jade, Tuojiang Shuiyu, Tuojiang Caiyu and Yangtze River Sister Jade, is a general term for all kinds of seed jade produced in Tuojiang River basin of Sichuan Province. Because the Tuojiang River originated in Jiuding Mountain, Maoxian County, Sichuan Province, with many tributaries and great changes. The jade materials produced are varied and colorful; In addition, the main stream of Tuojiang River passes through Zizhou (now Ziyang area in Sichuan and Neijiang area in Sichuan), the exile place of Changhong, a famous minister in the Eastern Zhou Dynasty, and Neijiang city in Sichuan, the hometown of Zhang Daqian, a famous master of Chinese painting, so the jade materials produced by Tuojiang River are honored as Changhong Jade and Daqianyu by jade players. There are many kinds of jade materials in Tuojiang River, mainly because the source of Tuojiang River is complex and there are many tributaries. Unlike other rivers, Tuojiang River is a mixed-race river. In addition to a part of Longxi jade (Hetian jade) in Longxi Township, Wenchuan County, Sichuan Province, various seed jade materials produced by other tributaries also rushed into Tuojiang River with geological changes. After tens of thousands of years of panning, only one kind of high-quality seed jade and some high-quality seed jade are left. Moreover, the total length of Tuojiang River is about 7 12km, which is a first-class tributary of the Yangtze River. Therefore, Tuojiang Daqian Jade is also called Yangtze Jade Sister Jade.

According to the testing standards of China People's * * and China National Jewelry and Jade Name (GB/T 16552) and Jewelry and Jade Identification (GB/T 16553), the jade materials produced in Tuojiang River meet the national testing standards of natural jade in terms of chemical composition, physical characteristics (hardness, internal crystal state and optical color characteristics), and pass the test.

In addition, because Daqian jade in Tuojiang River is the essence of jade after long-term river scouring and soil and water nourishment, its value is 5 to 15 times higher than that of Shanyu mine, and some seed jade skins are usually left during processing to show its seed jade identity.