This photo taken on July 5, 2023 shows the test train 55301 before departing from Guiyang North Station in Guiyang, southwest China's Guizhou Province. (Xinhua/Liu Xu)

With the departure of the test train 55301 from Guiyang North Station, the Guiyang-Nanning high-speed railway officially entered the final stage of its operation tests on Wednesday.

The railway, with a designed speed of 350 kilometers per hour, is expected to shorten the travel time between Guiyang of Guizhou Province and Nanning of Guangxi Zhuang Autonomous Region from more than 5 hours to about 2 hours.

An attendant works on the test train 55301 at Guiyang North Station in Guiyang, southwest China's Guizhou Province, July 5, 2023. (Xinhua/Liu Xu)

This photo taken on July 5, 2023 shows the test train 55301 running past the Longli North Station, southwest China's Guizhou Province. (Photo by Zeng Ming/Xinhua)

This aerial photo taken on July 5, 2023 shows the test train 55301 (L) running on a grand bridge in Longli County, southwest China's Guizhou Province. (Photo by Yang Jiewen/Xinhua)