![In this aerial photo taken on June 23, 2018, workers construct a bridge in the Gansu-Ningxia section of the Yinchuan-Xi\'an high-speed railway in northwest China\'s Ningxia Hui Autonomous Region. The 617-kilometer high-speed railway is scheduled to start operation by the end of 2020 with a design speed of 250 kilometers per hour. (Xinhua/Hou Dongtao)](http://www.ecns.cn/hd/2018/06/25/18f55a956a0d4fe79b2138f200277dba.jpg)
In this aerial photo taken on June 23, 2018, workers construct a bridge in the Gansu-Ningxia section of the Yinchuan-Xi'an high-speed railway in northwest China's Ningxia Hui Autonomous Region. The 617-kilometer high-speed railway is scheduled to start operation by the end of 2020 with a design speed of 250 kilometers per hour. (Xinhua/Hou Dongtao)
![In this aerial photo taken on June 23, 2018, workers make prefabricated building parts for the Gansu-Ningxia section of the Yinchuan-Xi\'an high-speed railway in northwest China\'s Ningxia Hui Autonomous Region. The 617-kilometer high-speed railway is scheduled to start operation by the end of 2020 with a design speed of 250 kilometers per hour. (Xinhua/Wang Peng)](http://www.ecns.cn/hd/2018/06/25/9644a40bb49141e38369e510c9cb14a5.jpg)
In this aerial photo taken on June 23, 2018, workers make prefabricated building parts for the Gansu-Ningxia section of the Yinchuan-Xi'an high-speed railway in northwest China's Ningxia Hui Autonomous Region. The 617-kilometer high-speed railway is scheduled to start operation by the end of 2020 with a design speed of 250 kilometers per hour. (Xinhua/Wang Peng)
![This aerial photo taken on June 23, 2018 shows prefabricated building parts for the Gansu-Ningxia section of the Yinchuan-Xi\'an high-speed railway in northwest China\'s Ningxia Hui Autonomous Region. The 617-kilometer high-speed railway is scheduled to start operation by the end of 2020 with a design speed of 250 kilometers per hour. (Xinhua/Wang Peng)](http://www.ecns.cn/hd/2018/06/25/85bfed8ec3724dd7a709250d0f7b4b6b.jpg)
This aerial photo taken on June 23, 2018 shows prefabricated building parts for the Gansu-Ningxia section of the Yinchuan-Xi'an high-speed railway in northwest China's Ningxia Hui Autonomous Region. The 617-kilometer high-speed railway is scheduled to start operation by the end of 2020 with a design speed of 250 kilometers per hour. (Xinhua/Wang Peng)
![Workers make prefabricated building parts for the Gansu-Ningxia section of the Yinchuan-Xi\'an high-speed railway in northwest China\'s Ningxia Hui Autonomous Region, June 23, 2018. The 617-kilometer high-speed railway is scheduled to start operation by the end of 2020 with a design speed of 250 kilometers per hour. (Xinhua/Wang Peng)](http://www.ecns.cn/hd/2018/06/25/20dca8edf0ea421d8adf2d28b5e59f68.jpg)
Workers make prefabricated building parts for the Gansu-Ningxia section of the Yinchuan-Xi'an high-speed railway in northwest China's Ningxia Hui Autonomous Region, June 23, 2018. The 617-kilometer high-speed railway is scheduled to start operation by the end of 2020 with a design speed of 250 kilometers per hour. (Xinhua/Wang Peng)
![A worker makes prefabricated building parts for the Gansu-Ningxia section of the Yinchuan-Xi\'an high-speed railway in northwest China\'s Ningxia Hui Autonomous Region, June 23, 2018. The 617-kilometer high-speed railway is scheduled to start operation by the end of 2020 with a design speed of 250 kilometers per hour. (Xinhua/Lin Fanjing)](http://www.ecns.cn/hd/2018/06/25/584663837f4d46e988f485ca4717035a.jpg)
A worker makes prefabricated building parts for the Gansu-Ningxia section of the Yinchuan-Xi'an high-speed railway in northwest China's Ningxia Hui Autonomous Region, June 23, 2018. The 617-kilometer high-speed railway is scheduled to start operation by the end of 2020 with a design speed of 250 kilometers per hour. (Xinhua/Lin Fanjing)
![In this aerial photo taken on June 23, 2018, workers construct a bridge in the Gansu-Ningxia section of the Yinchuan-Xi\'an high-speed railway in northwest China\'s Ningxia Hui Autonomous Region. The 617-kilometer high-speed railway is scheduled to start operation by the end of 2020 with a design speed of 250 kilometers per hour. (Xinhua/Wang Yiliang)](http://www.ecns.cn/hd/2018/06/25/24eeb146099245a19e9c1180da01d8ff.jpg)
In this aerial photo taken on June 23, 2018, workers construct a bridge in the Gansu-Ningxia section of the Yinchuan-Xi'an high-speed railway in northwest China's Ningxia Hui Autonomous Region. The 617-kilometer high-speed railway is scheduled to start operation by the end of 2020 with a design speed of 250 kilometers per hour. (Xinhua/Wang Yiliang)
![In this aerial photo taken on June 23, 2018, workers construct a bridge in the Gansu-Ningxia section of the Yinchuan-Xi\'an high-speed railway in northwest China\'s Ningxia Hui Autonomous Region. The 617-kilometer high-speed railway is scheduled to start operation by the end of 2020 with a design speed of 250 kilometers per hour. (Xinhua/Wang Peng)](http://www.ecns.cn/hd/2018/06/25/3d166f139a7c4914a91507844180e6c0.jpg)
In this aerial photo taken on June 23, 2018, workers construct a bridge in the Gansu-Ningxia section of the Yinchuan-Xi'an high-speed railway in northwest China's Ningxia Hui Autonomous Region. The 617-kilometer high-speed railway is scheduled to start operation by the end of 2020 with a design speed of 250 kilometers per hour. (Xinhua/Wang Peng)
![In this aerial photo taken on June 23, 2018, workers construct a bridge in the Gansu-Ningxia section of the Yinchuan-Xi\'an high-speed railway in northwest China\'s Ningxia Hui Autonomous Region. The 617-kilometer high-speed railway is scheduled to start operation by the end of 2020 with a design speed of 250 kilometers per hour. (Xinhua/Hou Dongtao)](http://www.ecns.cn/hd/2018/06/25/eeb2b2fe10db43eba8a8f3889627066e.jpg)
In this aerial photo taken on June 23, 2018, workers construct a bridge in the Gansu-Ningxia section of the Yinchuan-Xi'an high-speed railway in northwest China's Ningxia Hui Autonomous Region. The 617-kilometer high-speed railway is scheduled to start operation by the end of 2020 with a design speed of 250 kilometers per hour. (Xinhua/Hou Dongtao)