A worker shows stainless steel 0.02 millimeters thick at a company in Taiyuan City, the capital of North China’s Shanxi Province, Aug. 8, 2018. The company started mass production of the advanced 0.02-millimeter-thick, 600-millimeter-wide stainless steel, which is said to have wide applications in a range of fields, including aerospace, automotive, electronics and computers. Sources said due to difficult production techniques, China used to import the product from Japan and Germany. (Photo: China News Service/Wei Liang)

The production line of 0.022-millimeter-thick stainless steel at in a company in Taiyuan City, the capital of North China’s Shanxi Province, Aug. 8, 2018. The company started mass production of the advanced 0.02-millimeter-thick, 600-millimeter-wide stainless steel, which is said to have wide applications in a range of fields, including aerospace, automotive, electronics and computers. Sources said due to difficult production techniques, China used to import the product from Japan and Germany. (Photo: China News Service/Wei Liang)

A worker shows stainless steel 0.02 millimeters thick at a company in Taiyuan City, the capital of North China’s Shanxi Province, Aug. 8, 2018. The company started mass production of the advanced 0.02-millimeter-thick, 600-millimeter-wide stainless steel, which is said to have wide applications in a range of fields, including aerospace, automotive, electronics and computers. Sources said due to difficult production techniques, China used to import the product from Japan and Germany. (Photo: China News Service/Wei Liang)

The production line of 0.022-millimeter-thick stainless steel at in a company in Taiyuan City, the capital of North China’s Shanxi Province, Aug. 8, 2018. The company started mass production of the advanced 0.02-millimeter-thick, 600-millimeter-wide stainless steel, which is said to have wide applications in a range of fields, including aerospace, automotive, electronics and computers. Sources said due to difficult production techniques, China used to import the product from Japan and Germany. (Photo: China News Service/Wei Liang)