A comprehensive inspection train is seen at Zhengzhou East Railway Station in Zhengzhou, central China's Henan Province, Aug. 13, 2019. (Xinhua/Li An)

High-speed railway line linking central and southwest China starts joint test at the Henan section.

ZHENGZHOU, Aug. 14, 2019 (Xinhua) -- The Henan section of Zhengzhou-Wanzhou railway started a joint test on Tuesday. The Zhengzhou-Wanzhou railway links Zhengzhou in central China's Henan Province and Wanzhou in southwest China's Chongqing Municipality. With a designed speed of 350 km per hour, the railway is an important part of the railway system in Henan Province.

A comprehensive inspection train runs on the Zhengzhou-Wanzhou railway line in Zhengzhou, central China's Henan Province. (Xinhua/Li An)

A driver of comprehensive inspection train makes preparation before departure at Zhengzhou East Railway Station in Zhengzhou, central China's Henan Province. (Xinhua/Li An)

A comprehensive inspection train is seen at Zhengzhou East Railway Station in Zhengzhou, central China's Henan Province. (Xinhua/Li An)

Staff members get on a comprehensive inspection train at Zhengzhou East Railway Station in Zhengzhou, central China's Henan Province. (Xinhua/Li An)

A comprehensive inspection train is seen at Zhengzhou East Railway Station in Zhengzhou, central China's Henan Province. (Xinhua/Li An)

A comprehensive inspection train is seen at Zhengzhou East Railway Station in Zhengzhou, central China's Henan Province. (Xinhua/Li An)

A comprehensive inspection train is seen at Zhengzhou East Railway Station in Zhengzhou, central China's Henan Province. (Xinhua/Li An)

A comprehensive inspection train leaves Zhengzhou East Railway Station in Zhengzhou, central China's Henan Province. (Xinhua/Li An)