A CETROVO train on display at the MetroTrans 2019, an event showcasing next-generation subway cars and technologies, July 26, 2019. CETROVO, developed by CRRC Qingdao Sifang, was one of the most-anticipated subway cars at the exhibition. It is environmentally friendly with an intelligent design and top speed of 140 km per hour. CETROVO is 13 percent lighter than the average subway carriage with a carbon fiber composite body and frame. [Photo/VCG]