Eastern China's Yiwu City emerges as hub for solar industry with five of the world's top 10 solar companies establishing production bases Five of world's top 10 solar firms have production bases in China's Yiwu 1.7w 08-22 17:53 READ MOST 我国授权纳米专利总数达46.4万件 居世界第一 9971 08-30 21:46 POPULAR TAGS 纳米 中科院 专利
