Recently, China unveiled the world's first commercially operational metro train built with carbon fiber materials, marking a significant leap in eco-friendly urban transportation technology. Developed by CRRC Qingdao Sifang and Qingdao Metro, the CETROVO 1.0 train achieves an impressive 11 percent weight reduction compared to traditional metal models. Lightweight vehicles are a key technology for developing eco-friendly and low-carbon rail vehicles. This innovation is crucial for promoting the green transformation of urban rail transit and achieving the industry's dual carbon goals, advancing China's metro train technology to new heights.