Zhangjiakou Hongji Investment Co., Ltd.is located in Zhangjiakou City, North Street on the 16th Mingde,  built in 2007 November, the company registered capital of 6,000,000 yuan. Hongji Mining companies holding subsidiary of Shanghai Gold Exchange is the second agent is the agent of China Gold Group, Shanghai Gold Exchange to promote all varieties of gold trading is the Zhangjiakou City, the first service provider of precious metals investment.