Delegates led by Vice Director Wei YU of the Raw Materials Department of the Ministry of Industry and Information Technology of China, and Vice President Fushan SHANG of China Nonferrous Metals Industry Association, paid a visit to Duobaoshan Copper Mine on August 9th and 10th, on the sideline of the 16th China Nonferrous Metals Forum which was held in Heihe City of Heilongjiang Province in Northe...