Besides, reserves of germanium, indium, zirconium, platinum, rock salt, sylvite, nickel, phosphate, mirabilite, arsenic and blue asbestos are also high. Significant copper deposits are found at Dongchuan, iron ore at Wuding, and coal at Xuanwei and Kaiyuan. Economic policy to locate new industry in interior areas with substantial mineral wealth, led to major industrial development in Yunnan, especially in the Kunming area.