The identification center only identifies whether it is natural jade. At present, there is no standard for the grade of jade in China. The identification of natural jadeite is of little significance because the price difference is too big. If it is "sun green", it should be "sun green". It has good color and poor transparency, but it is not planted well, and it can't reach glass and ice seeds. If it doesn't, it can't be sunny, full of green. Therefore, "yang green" may also be unreliable. B goods are washed with hydrochloric acid, and C goods are dyed, which may be allergic. A goods have not been bleached and dyed, but after heating, they may be dipped in wax to increase luster and may also cause allergies. Boiling in water 10 minute can solve the allergic problem. However, things in Beijing Gongmei Building are very expensive. 5800 yuan is worth several hundred yuan.