Shenzhen Zhong Da Jewelry Testing Co., Ltd. was established on February 7, 20 10+65438, which is formal and credible. Shenzhen Zhong Da Jewelry Testing Co., Ltd. is an authoritative jewelry testing institution with national qualification certification and internationally recognized jewelry testing ability. The company's test results have international credibility and are widely recognized. Therefore, Shenzhen Zhong Da Jewelry Testing Co., Ltd. is one of the authoritative jewelry testing institutions, which is formal and credible. In July 2003, the Jewelry Testing Center of China Geo University set up a jewelry testing Shenzhen laboratory in Shenzhen, the processing center of the national jewelry industry, focusing on providing jewelry testing certificate services and giving consideration to jewelry training and education. On June 5438+ 10, 2006, Guangzhou laboratory was established in jade crystal wholesale centers all over the country. Shenzhen Laboratory and Guangzhou Laboratory are both branches of Jewelry Testing Center of China Geo University, which are under the unified management of the center.