Yinchuan-Xi'an high-speed railway under construction

Aerial photo taken on July 7, 2018 shows the construction site of a bridge in the Gansu-Ningxia section of the Yinchuan-Xi'an high-speed railway in northwest China. The 618-kilometer high-speed railway is scheduled to start operation by the end of 2020, and will reduce travel time between Yinchuan in Ningxia Hui Autonomous Region and Xi'an in Shaanxi Province to about three hours. (Xinhua/Wang Peng)

People work at the construction site of the Gansu-Ningxia section of the Yinchuan-Xi'an high-speed railway in northwest China, July 7, 2018. The 618-kilometer high-speed railway is scheduled to start operation by the end of 2020, and will reduce travel time between Yinchuan in Ningxia Hui Autonomous Region and Xi'an in Shaanxi Province to about three hours. (Xinhua/Wang Peng)

Workers patrol the manufacturing site of prefabricated building parts for the Gansu-Ningxia section of the Yinchuan-Xi'an high-speed railway in northwest China, July 7, 2018. The 618-kilometer high-speed railway is scheduled to start operation by the end of 2020, and will reduce travel time between Yinchuan in Ningxia Hui Autonomous Region and Xi'an in Shaanxi Province to about three hours. (Xinhua/Wang Peng)

In this aerial photo taken on July 7, 2018, workers construct a bridge in the Gansu-Ningxia section of the Yinchuan-Xi'an high-speed railway in northwest China. The 618-kilometer high-speed railway is scheduled to start operation by the end of 2020, and will reduce travel time between Yinchuan in Ningxia Hui Autonomous Region and Xi'an in Shaanxi Province to about three hours. (Xinhua/Wang Peng)

In this photo taken on July 7, 2018, workers construct a bridge in the Gansu-Ningxia section of the Yinchuan-Xi'an high-speed railway in northwest China. The 618-kilometer high-speed railway is scheduled to start operation by the end of 2020, and will reduce travel time between Yinchuan in Ningxia Hui Autonomous Region and Xi'an in Shaanxi Province to about three hours. (Xinhua/Zhu Xiang)