Passengers stand inside a subway train at the Shakoulu station of Zhengzhou Metro Line 5 in Zhengzhou, Central China’s Henan province, on Wednesday, after the subway resumed operation. Photo: VCG

People take the escalator in a station along the Metro Line 5 on Wednesday in Zhengzhou. Photo: VCG

A volunteer guides passengers Wednesday inside a subway station in Zhengzhou. Photo: VCG

A passenger walks past the Zijingshan station in Zhengzhou on Sunday, after the Metro Line 1 and parts of Metro Line 2 that pass through the station resumed operation. Photo: The Paper

A subway train of Zhengzhou Metro Line 5 is crowded with passengers on Wednesday. Photo: VCG

A security guard patrols inside a subway train in Zhengzhou on Sunday. Photo: IC Photo

A driver operates a subway train in Zhengzhou on Sunday. Photo: VCG

A Metro Line 5 train passes through an underground tunnel on Wednesday. Photo: VCG

Passengers enter the Shakoulu station on Wednesday in Zhengzhou. Photo: VCG

Rows of bouquets are placed outside the B entrance of the Shakoulu station on July 30 in Zhengzhou in memory of the victims of the Metro Line 5 flooding. Photo: VCG