The Cgtl certificate is reliable and very reliable. It is a prestigious professional jewelry training institution in China, with cgtl certificate industry practitioners, jewelry students, amateurs, people who are about to engage in jewelry industry and consumers as training targets. The training course covers jewelry management, management, sales, planning, identification, design and processing.

The certificate of cgrl You Guo Jewelry Testing Center is very authoritative.

The laboratory has senior professionals composed of senior jewelry appraisers, and is a professional team with rich experience, international vision and deep participation in the formulation of national standards for jewelry and jade. Adhering to the strict quality management system and workflow, the laboratory provides all-round jewelry testing services for the society.