Photo taken on Dec 25, 2016 shows Beijing's first medium-low speed maglev Line S1 in Beijing. The Line S1, which connects the city's western district of Mentougou to the Pingguoyuan subway station in Shijingshan district, is expected to begin operating in 2017. With a maximum speed of 100 kilometers per hour, the train will stop at eight stations and serve about 1,302 passengers at a time.[Photo/Xinhua]