According to official website information of Guo Jinzhubao Testing Center, Foshan Guo Jinzhubao Testing Technology Service Co., Ltd. is a formal jewelry testing service organization that has passed the qualification certification (metrological certification) of national product quality supervision institutions and is recognized by laboratories.

Guo Jinzhubao Testing Center has CMA, CAL and CNAS inspection qualification certificates, and is an impartial and independent third-party gold, silver and jewelry testing laboratory. The reports and certificates issued by Guo Jinzhubao Testing Center have legal effect, and provide high-quality jewelry and jade testing services for enterprises, consumers and government units in society according to national laws and regulations and national standards.