Constructors work at the construction site of Zhengzhou South Railway Station in Zhengzhou, central China's Henan Province, July 13, 2020. (Xinhua/Li An)

A constructor works at the construction site of Zhengzhou South Railway Station in Zhengzhou, central China's Henan Province, July 13, 2020. (Xinhua/Li An)

A constructor works at the construction site of Zhengzhou South Railway Station in Zhengzhou, central China's Henan Province, July 13, 2020. (Xinhua/Li An)

A constructor works at the construction site of Zhengzhou South Railway Station in Zhengzhou, central China's Henan Province, July 13, 2020. (Xinhua/Li An)

A constructor works at the construction site of Zhengzhou South Railway Station in Zhengzhou, central China's Henan Province, July 13, 2020. (Xinhua/Li An)

Photo taken on July 13, 2020 shows the construction site of Zhengzhou South Railway Station in Zhengzhou, central China's Henan Province. (Xinhua/Li An)

Aerial photo taken on July 13, 2020 shows the construction site of Zhengzhou South Railway Station in Zhengzhou, central China's Henan Province. (Xinhua/Li An)

Aerial photo taken on July 13, 2020 shows the construction site of Zhengzhou South Railway Station in Zhengzhou, central China's Henan Province. (Xinhua/Li An)