An aerial photo taken on Oct. 6, 2016 shows a high-speed railway on the Tunli Super Large Bridge in Nanning, capital of south China's Guangxi Zhuang Autonomous Region. China's high-speed railways now exceed 20,000 km in length. (Photo/Xinhua)
An aerial photo taken on Oct. 6, 2016 shows a high-speed railway on the Tunli Super Large Bridge in Nanning, capital of south China's Guangxi Zhuang Autonomous Region. China's high-speed railways now exceed 20,000 km in length. (Photo/Xinhua)
An aerial photo taken on Oct. 6, 2016 shows a high-speed railway on the Tunli Super Large Bridge in Nanning, capital of south China's Guangxi Zhuang Autonomous Region. China's high-speed railways now exceed 20,000 km in length. (Photo/Xinhua)
An aerial photo taken on Oct. 6, 2016 shows a high-speed railway on the Tunli Super Large Bridge in Nanning, capital of south China's Guangxi Zhuang Autonomous Region. China's high-speed railways now exceed 20,000 km in length. (Photo/Xinhua)
An aerial photo taken on Oct. 6, 2016 shows a high-speed railway on the Tunli Super Large Bridge in Nanning, capital of south China's Guangxi Zhuang Autonomous Region. China's high-speed railways now exceed 20,000 km in length. (Photo/Xinhua)