The world’s first carbon fiber metro train, the CETROVO 1.0 Carbon Star Express, developed by CRRC Corporation Limited and Qingdao Metro, has made its debut on Line 1 in Qingdao, Shandong Province. It fills the gap in the commercial application of carbon fiber composite materials in the primary load-bearing structures of metro vehicles, representing a significant upgrade in lightweight technology and the green transformation of China’s metro trains. Compared with traditional metal metro vehicles, the carbon fiber train is approximately 11 percent lighter, with operational energy consumption reduced by 7 percent. Each train can reduce carbon dioxide emissions by 130 tons annually. In addition, the use of carbon fiber enhances vibration and noise reduction. (....)