According to the test results, the China-Shenzhen Guoyin Jewelry Testing Center concluded that there is truth and falsehood. According to relevant public information, CGTC, China-Shenzhen Guoyin Jewelry Testing Center, is a legally authorized jewelry and jade quality testing institution, which has passed the CMA qualification certification of the national product quality supervision and inspection institution and the third-party testing institution recognized by the laboratory. It is a professional organization for jewelry and precious metal jewelry testing in China, and it is a jewelry testing and appraisal institution with an independent legal person. It will explain the true and false information of the identified items to customers according to the test results.