There is a big river in northern Myanmar, which is called Uyou River (also called Lu Wu River) by the locals. Historically, many areas in northern Myanmar were under the jurisdiction of China, and the Wuyou River area was under the jurisdiction of Yongchang Prefecture in Yunnan during the Wanli period of the Ming Dynasty, and Yongchang Prefecture is now in Dehong Prefecture. In the Qing Dynasty, it also belonged to the territory of China. Now it belongs to Myitkyina, Myanmar, and the nearest big city is Mandalay, also called Wacheng. In the Qing Dynasty, it mainly collected the original jadeite stone at the bottom of Una River, which is also called water stone now. In order to get stones, people tie a rope around their waist and one end to the boat, jump into the river and touch the stones, and hold their breath when they touch a piece. At the end of the day, there are not many stones to pick up. This kind of work is very dangerous. People often drown in the water. These stones have a layer of jade, which is what experts call leather. It is impossible to tell what is inside the stones. Those who buy stones can only give a random price and transport them to Yunnan to cut stones. If there is blue-purple in the stone and the variety is good, it can be processed and made. Old experts also call it jade in stone, so they will get rich overnight. If there is no jade in the stone, it will often be lost. In the world, the origin of diamonds includes Africa, Australia, Europe, Asia, America and many other countries, while jewel-grade jadeite is only produced in Myanmar. Although jadeite (jadeite) is also produced in Russia, Japan and other places, it is far from the jewelry level. There is a big river in northern Myanmar, which is called Uyou River (also called Lu Wu River) by the locals. Historically, many areas in northern Myanmar were under the jurisdiction of China, and the Wuyou River area was under the jurisdiction of Yongchang Prefecture in Yunnan during the Wanli period of the Ming Dynasty, and Yongchang Prefecture is now in Dehong Prefecture. In the Qing Dynasty, it also belonged to the territory of China. Now it belongs to Myitkyina, Myanmar, and the nearest big city is Mandalay, also called Wacheng. In the Qing Dynasty, it mainly collected the original jadeite stone at the bottom of Una River, which is also called water stone now. In order to get stones, people tie a rope around their waist and one end to the boat, jump into the river and touch the stones, and hold their breath when they touch a piece. At the end of the day, there are not many stones to pick up. This kind of work is very dangerous. People often drown in the water. These stones have a layer of jade, which is what experts call leather. It is impossible to tell what is inside the stones. Those who buy stones can only give a random price and transport them to Yunnan to cut stones. If there is blue-purple in the stone and the variety is good, it can be processed and made. Old experts also call it jade in stone, so they will get rich overnight. If there is no jade in the stone, it will often be lost. In modern times, the river in the emerald mining area has been drained, and large-scale mechanical excavation has been used on the river bed. The stones that cannot be mined by manpower for thousands of years will be exhausted in decades. In addition, large-scale mining has also begun in the mountainous areas around Wuyou River. Most of these materials have no skin, coarse mineral particles, insufficient water head and poor seeds. Locals call jade mines jade factories, and different mines are named after place names (also called factory entrances). The most famous factories are Pagan, Ma Meng, Huika and Houjiang, among which the old factory in Ma Meng is the earliest birthplace of jadeite. Old Pagan is in the east of Pagan, not far from the Uyou River. Rock and soil collapse often occurs here in rainy season, which is called Pagan in local language. The jade material at the entrance of this factory is made of conglomerate and is very hard. Houjiang Factory was discovered in the 1960s, and the jade materials produced here are generally small and mixed with gravel. Houjiang material is a typical water stone with excellent water color, but the disadvantage is that the color is slightly lighter and there are few bright green jade materials.