CGIC is a third-party testing institution recognized by the state and a national jewelry quality supervision and testing institution approved by China Business Federation in the field of commercial circulation. China Business Federation authorized CGIC to carry out testing business nationwide. "CGIC network mobile station" provides jewelry identification, diamond identification or grading, precious metal detection services for domestic diamond jewelry online merchants, and can also provide consumers with technical services such as re-inspection, detection and identification of diamond jewelry. CGIC has a group of authoritative experts in diamond and jewelry appraisal, national registered jewelry and jade quality inspector (CGC), international diamond grader (DGA) and other professional technicians. CGIC has a complete set of nondestructive diamond jewelry appraisal instruments, infrared spectrometers, gold detectors and other large-scale instruments and equipment, and can independently issue reports such as Jewelry Appraisal Certificate, Diamond Appraisal Classification Certificate, Jewelry Jade Jewelry and Precious Metal Detection.