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The Yancheng–Nantong high-speed railway or Yantong high-speed railway is a high-speed line between Yancheng and Nantong in China. It has a length of 156.6 kilometres (97.3 mi) and a design speed of 350 kilometres per hour (220 mph).The line opened on 30 December 2020. The initial operating speed will be 300 kilometres per hour (190 mph).