The first subway in China was built in Beijing in 1969. By the end of 2016, there are 30 metro systems in Mainland China with a total combined length of 3,586 kilometers (2,228 miles). Today China boasts the world’s longest, second and fourth longest metro systems. The Shanghai Metro only started operating in 1993 and has since expanded to be the world’s longest subway system. Half of the top ten busiest metro systems in the world are in China.
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