Miyu, also known as "Henan Jade", is named after it was produced in xinmi city, Henan Province, and is one of Dongling Stone in a broad sense. Mi language is internationally known as "Henan cuisine", and it is also known as the four famous jade in China with Hetian jade in Xinjiang, Xiuyu jade in Liaoning and dushan jade in Nanyang. As for Miyu jewelry, I saw it in the Expo Park when I traveled to Kunming. Xinmi city, Henan Province is a famous producer of dense jade in China. Mi language was developed and utilized in ancient times, and it was mostly used to make small items such as cigarette holders and bracelets. 1960, a piece of jade with a height of1.28m and a weight of1.35t was found in Zhuquansi Jade Mine. Handicraft carved by shanghai jade carving workers as "China mountaineers climb Mount Everest". It was praised by the leaders of China. Now it is listed as a national treasure. It is kept in Shanghai Museum. For decades, secret jade has been used to make small jade and jewelry, especially ornaments or works of art made of green secret jade, which are deeply loved by Chinese and foreign people. Mi language is internationally known as "Henan cuisine", and it is also known as the four famous jade in China with Hetian jade in Xinjiang, Xiuyu jade in Liaoning and dushan jade in Nanyang. According to different colors, it can be divided into four types: green, red, white and black. It is glassy and greasy, with a refractive index of about 1.55, a hardness of 7 and a density of about 2.7 cubic centimeters. Dense, delicate, tough and smooth, dark green is the best, and the weight of the block is more than 6 kg. The bigger the better.