Weifang Wanbao Mining Co., Ltd. was established in April 2004. The mining area is located in Changyi City, Weifang City, Shandong Province. The registered capital is 20 million yuan, the total assets are 91.53 million yuan, and the designed mining scale is 600,000 tons per year. Shaft development method, the maximum mining depth is 405 meters; 3 vertical shafts (main shaft, auxiliary shaft and wind shaft) are built, and the supporting design of mineral processing is 600,000 tons per year. process flow.