NANNING, May 18, 2016 (Xinhua) -- Photo taken on May 17, 2016 shows bullet trains in Nanning, capital of south China's Guangxi Zhuang Autonomous Region. Guangxi has had a high-speed rail mileage of over 1,700 kilometers since high-speed train introduced into Guangxi at the end of 2013. (Xinhua/Huang Xiaobang)
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