There are five places to detect gold in Fuyong, Shajing, Shenzhen. The places where diamond rings can be identified in Shenzhen are NGTC (6th floor of Investment Building or Jinli International Jewelry Exchange Plaza 1 Building), Shenzhen Shuibei Inspection Station of National Gold and Silver Products Quality Inspection Center (Nanjing National Inspection), Guangdong Jewelry and Jade Quality Supervision and Inspection Center, Shenzhen Shuibei Inspection Station of Jewelry Testing Center of China Geo University and Shenzhen Shuibei Inspection Station of Beijing Geo University.