Guangzhou Chen Zhong Guojian Jewelry Appraisal Co., Ltd. is trustworthy. Because it is approved by the relevant state departments, it is a legally established institution specializing in the quality inspection of precious metals, jewels and jade, and has passed the evaluation of National Laboratory Accreditation (CNAS), International Mutual Recognition (ILAC) and Metrology Certification (CMA). It is a fair third-party gold, silver and jewelry inspection institution, and the reports and certificates issued by it have legal effect, and undertake entrusted inspection, quality supervision, spot check and arbitration inspection of precious metals, jewelry and jade products nationwide.