1, country: National Jewelry Quality Supervision and Inspection Center (formerly under the Jewelry and Jade Jewelry Management Center of the Ministry of Land and Resources), etc.

2. Provincial level: Yunnan Jewelry Quality Supervision and Inspection Institute (under Yunnan Quality and Technical Supervision Bureau), etc.

3. Municipal level: Dalian Gold, Silver and Jewelry Supervision and Inspection Center (affiliated to the Product Quality Supervision and Inspection Institute of Dalian Bureau of Quality and Technical Supervision), etc.

In terms of talents, funds, management and scientific research. The higher the administrative level, the greater the inherent advantages of testing institutions, so it is easier to gain market recognition.