A prototype tram powered by hydrogen fuel cells was unveiled at the CSR Sifang factory in Qingdao on March 19. According to CSR Qingdao Sifang Chief Engineer Liang Jianying, the tram is able to run for 100 km at speeds up to 70 km/h before the cells need to be refilled, which takes 3 min. Water is the only emission during operation.