Yunnan Hengxin Jewelry Testing Center is regular. Yunnan Hengxin Jewelry Testing Center has been certified by the Bureau of Quality and Technical Supervision and obtained the certificate of China Metrology Certification. Is a newly established impartial and authoritative third-party jewelry testing laboratory independent of government agencies and jewelry market on 20 16. With scientific, accurate, standardized, fair and efficient service tenet, we have created an authoritative certificate, excellent team and perfect service with a brand-new look.