Chengdu-Guiyang railway in operation(1/7)

A train runs on Xiangbahe grand bridge during a trial operation of Chengdu-Guiyang railway in southwest China's Guizhou Province, Dec. 3, 2019. The 650-kilometer railway, an important part of the country's high-speed rail network, is expected to be in operation on Dec. 16. (Xinhua/Liu Xu)

Aerial photo shows the Chengdu-Guiyang railway in Qingzhen in southwest China's Guizhou Province, Dec. 15, 2019. The 650-kilometer railway, an important part of the country's high-speed rail network, is expected to be in operation on Dec. 16. (Xinhua/Yang Wenbin)

A train runs in Qingzhen County during a trial operation of Chengdu-Guiyang railway in southwest China's Guizhou Province, Dec. 15, 2019. The 650-kilometer railway, an important part of the country's high-speed rail network, is expected to be in operation on Dec. 16. (Xinhua/Yang Wenbin)

Aerial photo shows the Chengdu-Guiyang railway in Qingzhen in southwest China's Guizhou Province, Dec. 15, 2019. The 650-kilometer railway, an important part of the country's high-speed rail network, is expected to be in operation on Dec. 16. (Xinhua/Yang Wenbin)

Photo shows the Bijie Station of Chengdu-Guiyang railway in southwest China's Guizhou Province, Dec. 15, 2019. The 650-kilometer railway, an important part of the country's high-speed rail network, is expected to be in operation on Dec. 16. (Xinhua/Ou Dongqu)

A train runs in a trial operation of Chengdu-Guiyang railway in southwest China's Guizhou Province, Dec. 3, 2019. The 650-kilometer railway, an important part of the country's high-speed rail network, is expected to be in operation on Dec. 16. (Xinhua/Liu Xu)

Aerial photo shows the Chengdu-Guiyang railway in Qingzhen in southwest China's Guizhou Province, Dec. 15, 2019. The 650-kilometer railway, an important part of the country's high-speed rail network, is expected to be in operation on Dec. 16. (Xinhua/Yang Wenbin)