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. [Photo/Xinhua]
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. [Photo/Xinhua]
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. [Photo/Xinhua]
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. [Photo/Xinhua]
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. [Photo/Xinhua]
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. [Photo/Xinhua]
