Our company is ISO9001: 2000 Certified Company, Tongxin perennial to supply of domestic for the northern district of the Chia Tai Group, COFCO, Zhengzhou Two Sand Group (former White Dove Group), Henan Jinqu Gold Co., Ltd., Panzhihua Iron and Steel Group, China Abrasives Import and Export Corporation, Xianyang Snub-nosed monkey Company, Nanchang unity, Shandong Morningstar, etc. well-known enterprises. And give Tsinghua University, Central South University, China Science and Technology, Chongqing, ASTRI and other research units of coal supply, and received their praise.