![](http://www.ecns.cn/hd/2019/12/03/533380b936e0494597f98ee02ee7bdae.jpg)
A train runs past the bridge over Yachi River during a trial operation of Chengdu-Guiyang railway in southwest China's Guizhou Province, Dec. 2, 2019. The 650-kilometer railway is an important part of the country's high-speed rail network consisting of eight main north-south lines and eight main east-west lines, with a design speed of 250 kilometers per hour. (Xinhua/Liu Xu)
![](http://www.ecns.cn/hd/2019/12/03/5a94400a60944b9385f6e2a413c4ac4e.jpg)
A train runs past the bridge over Yachi River during a trial operation of Chengdu-Guiyang railway in southwest China's Guizhou Province, Dec. 2, 2019. The 650-kilometer railway is an important part of the country's high-speed rail network consisting of eight main north-south lines and eight main east-west lines, with a design speed of 250 kilometers per hour. (Xinhua/Liu Xu)
![](http://www.ecns.cn/hd/2019/12/03/b688a23b9cab4b21b2fbb8d37b44b4c0.jpg)
Aerial photo taken on Dec. 2, 2019 shows a train running past the bridge over Xixi River during a trial operation of Chengdu-Guiyang railway in southwest China's Guizhou Province. The 650-kilometer railway is an important part of the country's high-speed rail network consisting of eight main north-south lines and eight main east-west lines, with a design speed of 250 kilometers per hour. (Xinhua/Liu Xu)
![](http://www.ecns.cn/hd/2019/12/03/42cdfd64ed3340a0a56d56e170f365c5.jpg)
A train runs past the bridge over Yachi River during a trial operation of Chengdu-Guiyang railway in southwest China's Guizhou Province, Dec. 2, 2019. The 650-kilometer railway is an important part of the country's high-speed rail network consisting of eight main north-south lines and eight main east-west lines, with a design speed of 250 kilometers per hour. (Xinhua/Liu Xu)
![](http://www.ecns.cn/hd/2019/12/03/e8571248ff3b4fbe8b474d11ccbb08b8.jpg)
A train runs past the bridge over Xixi River during a trial operation of Chengdu-Guiyang railway in southwest China's Guizhou Province, Dec. 2, 2019. The 650-kilometer railway is an important part of the country's high-speed rail network consisting of eight main north-south lines and eight main east-west lines, with a design speed of 250 kilometers per hour. (Xinhua/Liu Xu)
![](http://www.ecns.cn/hd/2019/12/03/77adedb4fbd54cb4af4fcaa3ff8a6fda.jpg)
Aerial photo taken on Dec. 2, 2019 shows a train running past the bridge over Yachi River during a trial operation of Chengdu-Guiyang railway in southwest China's Guizhou Province. The 650-kilometer railway is an important part of the country's high-speed rail network consisting of eight main north-south lines and eight main east-west lines, with a design speed of 250 kilometers per hour. (Xinhua/Liu Xu)
![](http://www.ecns.cn/hd/2019/12/03/da205c2cbc47450d8c1762aaa302ba46.jpg)
A train runs past the bridge over Yachi River during a trial operation of Chengdu-Guiyang railway in southwest China's Guizhou Province, Dec. 2, 2019. The 650-kilometer railway is an important part of the country's high-speed rail network consisting of eight main north-south lines and eight main east-west lines, with a design speed of 250 kilometers per hour. (Xinhua/Liu Xu)
![](http://www.ecns.cn/hd/2019/12/03/b9ada87eaf3340acb1942ea484f0893c.jpg)
Aerial photo taken on Dec. 2, 2019 shows a train running past the bridge over Yachi River during a trial operation of Chengdu-Guiyang railway in southwest China's Guizhou Province. The 650-kilometer railway is an important part of the country's high-speed rail network consisting of eight main north-south lines and eight main east-west lines, with a design speed of 250 kilometers per hour. (Xinhua/Liu Xu)