Average annual increases in export earnings form machinery and electronic products now exceed 40 percent. The machinery industries in the cities of Baoji, Luoyang, and Lanzhou, xuzhou, and Xian within the Longhai-Lanxin economic zone account for half of the total machinery industry in China. Beijing, Shanghai, and Tianjin are also leading production centers. China has deposits of most metals and commercial deposits of about 129 types of minerals. The world's largest reserves of molybdenum, phosphate, titanium, and tungsten, and a dozen other minerals which are in China.
China is a major provider of tungsten, tin, mercury, and antimony in the world.
Recently, China has become an important exporter of germanium, gallium, polycrystalline silicon, titanium, and vanadium. Metal products, hardware, and building supplies are also available throughout China. Building materials include cement, glass, stone products, and ceramics. Rubber and Plastic Products Rubber products have been one of China's traditional, slow-growth, export items. However, in light of international demand for rubber goods, China's export of rubber and plastic products will increase rapidly.