Guests visit inside of China's first high-speed maglev train testing prototype in Qingdao, east China's Shandong Province,on May 23, 2019. China on Thursday rolled off the production line a prototype magnetic-levitation train with a designed top speed of 600 km per hour in the eastern city of Qingdao. The debut of China's first high-speed maglev train testing prototype marks a major breakthrough for the country in the high-speed maglev transit system. The engineering prototype is scheduled to roll off the production line in 2020 and go through comprehensive tests to finish integrated verification in 2021. (Xinhua/Li Ziheng)