NGTC Jewelry and Jade Quality Supervision and Inspection Center, called National Gem Testing Center, belongs to the Jewelry and Jade Jewelry Management Center of the Ministry of Land and Resources. Guo Zihao is a professional jewelry testing training institution. Zhuji Laboratory is the only organization set up by NGTC in county-level cities in China. Zhuji Laboratory of NGTC National Inspection Center was introduced, environmental testing center was built, and professional instruments and equipment such as X-ray diffractometer and gas chromatograph were purchased. Up to now, * * * has invested 8.5 million yuan to purchase professional instruments and equipment 12 sets, and has more than 30 testing related personnel. It is also one of the testing institutions designated by the official live broadcast platform.