Reliable. According to the brief introduction of Zhongbaojian Shanwei Jewelry Appraisal Service Co., Ltd., Zhongbaojian Shanwei Jewelry Appraisal Service Co., Ltd. is a formal and legal company and is protected by law. Zhong Jian Jewelry Testing Center is a third-party testing institution authorized by law to set up jewelry and jade quality testing institutions. It has passed the qualification certification of national product quality supervision and inspection institutions, obtained the metrological certification certificate and obtained the laboratory approval, and can produce certified data and results. The test data results are quite reliable.