A technician operates a processing machine for super-thin stainless steel foil at Taiyuan Iron & Steel Co (TISCO) factory in Taiyuan, Shanxi province, May 24. After years of independent research and development, TISCO, a leading steel company in China, now has more than 2,700 patents and proprietary technologies primarily involving stainless steel, 772 of which are invention patents. It has presided over the development of 70 percent of China's national standards for the stainless steel industry and its products meet international standards and have a global market presence. [Photo/Xinhua]
Coils of super-thin stainless steel foil manufactured by TISCO, May 24 [Photo/Xinhua]