People try out a new-generation carbon-fiber light rail train at an exhibition held in Changchun, capital of northeast China's Jilin Province, Sept. 7, 2018. The body of the train is made of carbon fiber composite, making it more energy-efficient, according to its manufacturer CRRC Changchun Railway Vehicles Co., Ltd. (Xinhua/Xu Chang)
People look at the new-generation carbon-fiber light rail train at an exhibition held in Changchun, capital of northeast China's Jilin Province, Sept. 7, 2018. The body of the train is made of carbon fiber composite, making it more energy-efficient, according to its manufacturer CRRC Changchun Railway Vehicles Co., Ltd. (Xinhua/Xu Chang)
People try out a new-generation carbon-fiber light rail train at an exhibition held in Changchun, capital of northeast China's Jilin Province, Sept. 7, 2018. The body of the train is made of carbon fiber composite, making it more energy-efficient, according to its manufacturer CRRC Changchun Railway Vehicles Co., Ltd. (Xinhua/Xu Chang)
A man tries out a new-generation carbon-fiber light rail train at an exhibition held in Changchun, capital of northeast China's Jilin Province, Sept. 7, 2018. The body of the train is made of carbon fiber composite, making it more energy-efficient, according to its manufacturer CRRC Changchun Railway Vehicles Co., Ltd. (Xinhua/Xu Chang)
A man visits the cockpit of a new-generation carbon-fiber light rail train at an exhibition held in Changchun, capital of northeast China's Jilin Province, Sept. 7, 2018. The body of the train is made of carbon fiber composite, making it more energy-efficient, according to its manufacturer CRRC Changchun Railway Vehicles Co., Ltd. (Xinhua/Xu Chang)