Zhongke Jian Jewelry and Jade Testing Center is not regular, and it is not in the catalogue of testing institutions in various provinces and cities across the country.

The signature of the appraisal unit "so-and-so quality supervision gem inspection center or station" and "so-and-so quality inspection center" must be available, because the General Administration of Quality Supervision, Inspection and Quarantine can't directly inspect the products, and it entrusts the automobile inspection center designated by its subordinates to designate a qualified inspection center or station for inspection.

Matters needing attention in jewelry inspection and testing institutions

1. Pay attention to the validity and continuity of testing qualification. All testing institutions shall, in accordance with the provisions of the Measures for the Administration of Qualification Identification of Inspection and Testing Institutions, ensure that the testing qualification is continuously effective. When the key technical conditions such as inspection workplace, standards or authorized signatories change, the change procedures shall be handled in time.

2. Standardize the signing of entrusted testing contracts. The entrusting party must indicate the required inspection methods, inspection items and technical parameters on the entrustment form, and determine the format category of the entrusted appraisal certificate or inspection report.