Zhonghui Jewelry and Jade Quality Supervision Center is located on the 22nd floor, Block C, World Trade Center, No.36, North Third Ring Road, Hepingli Street, Dongcheng District, Beijing. Zhonghui Jewelry and Jade Quality Supervision Center has passed the metrological certification, authorization and laboratory approval of the national product quality supervision and inspection institutions, and is the authoritative organization for jewelry and jade jewelry testing in China. Floor 22, Building C, World Trade Center, No.36 North Third Ring Road, Hepingli Street, Dongcheng District, Beijing