The ore area is located in Dulongzhen, Wenshan Prefecture, southeast of Yunnan. It connects to Vietnam in the south by a straight line of 5.5 km. Mainly based on agriculture, Maguan is poor in industry, so Dulong Sn-ores is the largest enterprise. Therefore, both the prefecture and provincial governments are determined to strengthen the work of capital introduction for further development of Manjiazhai deep ore body as to protect environment, make full use of resources and ensure safety. The output and consumption in the world tends to be in balance, but the consumption in China has increased from 15,000 t in 1990 to 36,200 t in 1995 to 42,800 t in 1996.
China is the greatest consumer in the world.
USD 57,230,000 for Zn and sulfuric acid and USD 10,240,000 for Sn smelting. Foreign Investment Requirements 1. Environmental Impact Around the slopes of Tongjie and Manjiazhai Ore-blocks are weeds and dry land without forest vegetation. The main effect on ecology is open-mining and waste stone piles. The original surface vegetation and outlook will be gradually destroyed with the process of mining.