Workers conduct power-supply installation at the construction site of the subway line 4 in Zhengzhou, central China's Henan Province, April 24, 2020. The 30 km subway line is now under construction here. (Xinhua/Zhu Xiang)
Subway line 4 in Zhengzhou under construction
Source: Xinhua| 2020-04-25 07:22:45|Editor: huaxia
