Supplement: Kunlun jade, also known as Qinghai jade. It comes from the eastern edge of Kunlun Mountain and enters Qinghai Province. It is in the same metallogenic belt as Hetian jade. The east of Kunlun Mountain is called Kunlun Jade, and the north of the mountain is called Hetian Jade. The linear distance between them is about 300 kilometers. Kunlun jade is delicate in texture, elegant and refreshing, oily and transparent. Can be divided into white jade, gray jade, sapphire, leucorrhea with green, sugar-coated white and so on. The top grade is crystal clear, round, pure, flawless, crack-free and impurity-free.