Following a flurry of openings in the final week of the year, a total of 5021.7km of urban rail lines were operational in 34 cities on December 31.
Chinese cities opened 33 new lines totalling 868.9km in 2017, a 62.5% increase compared with 2016, when 534.8km of new lines were completed.
Cities opening their first metro lines in 2017 included Shijiazhuang, Zhuhai, Guiyang, and Xiamen.
Metro accounts for 77.3% of urban rail lines in China, with 3881.8km in operation at the end of 2017. There is also 476.8km of light rail and tramway (9.4% of the total), 98.5km of monorail (2%), and 58.8km of maglev lines (1.2%).