“A total of 37 cities on the Chinese mainland had rail transit systems in operation as of June 30,

“A total of 37 cities on the Chinese mainland had #rail transit systems in operation as of June 30, with a total length of 6126.82 km. Another 2-3 cities are expected to install urban rail transit systems by 2019, adding 600 km in length, said the China Association of Metros.”

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