The 19-station line starts at Nanjing South Railway Station and runs underground for 14.2km before crossing the Yangtze River on the 1.6km Dashengguan Bridge, one of the world’s largest arch bridges, which it shares with the Beijing - Shanghai high-speed line. The line then continues along the west bank of the river to reach the terminus at Gaojiachong.

The line is equipped with 1.5kV dc overhead electrification and services are operated by a fleet of 24 six-car Type B trains supplied by CRRC Nanjing Puzhen.

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