Hefei light industry jewelry and jade authoritative testing center. According to relevant data, Hefei Light Industry Jewelry and Jade Testing Center is a legal quality testing institution authorized by the State Light Industry, which has been certified by CMA(95) State (C 1359) of the State Bureau of Technical Supervision, and has passed many measurement rechecks. There is a red CMA certification mark on the certificate, which is certified by the national metrology department.