2015 China Labor Insurance Business Circulation Industry Service Standardization Enterprise assessment produced a total of 25 drill-level companies, including four companies with five diamonds, twelve companies with four diamonds, and nine companies with three diamonds. The detailed list is as follows (in no particular order): Five diamond-class companies: Shanghai Hangli Industrial Co., Ltd., Shenzhen Pengliang Industry & Trade Co., Ltd., Linyi Xinminghui Security Technology Co., Ltd., Guangzhou Nanfang Labor Insurance Supplies Supply Co., Ltd. Four Diamonds: Beijing Occupational Safety and Health Technology Co., Ltd., Tianjin Century St. Baite Trading Co., Ltd., Tianjin Hongqi Labor Insurance Department Store Purchasing and Supply Station, Changchun Taizhou Labor Protection Products Co., Ltd., Wuxi Tianan Safety Equipment Co., Ltd., Zhejiang Nuclear Power Special Security Equipment Co., Ltd., Shandong Linyi Hengan Labor Protection Products Co., Ltd., Guangzhou Qiaoyou Labor Protection Special Supply Co., Ltd., Shenzhen Huaan Labor Insurance Products Co., Ltd., Chongqing Department Store Co., Ltd. labor insurance supplies branch, Xi'an labor protection supplies limited Company, Shaanxi Bangsheng Labor Protection Industry and Trade Co., Ltd. Three diamond-class companies: Xinjiang Down Security Equipment Co., Ltd., Dalian Si An Labor Insurance Products Co., Ltd., Harbin Ruifeng Year Labor Insurance Products Co., Ltd., Wuxi City Labor Insurance Products Co., Ltd., Nantong China Textile Labor Protection Products Co., Ltd., and Yangzhou Zhongxing Labor Protection Products Co., Ltd., Hangzhou Xinxing Safety Products Co., Ltd., Ningbo Ning Department Store Labor Protection Products Co., Ltd., and Jinan Anjian Safety Protection Products Co., Ltd. China Textile Business Association Safety and Health Protection Products Committee Aluminum Tubes,Aluminum Square Tube,Aluminum Round Tubes,Industrial Aluminum Tube Guangdong Jihua Aluminium Co., LTD , https://www.jihua-alu.com