This is the Jiayuguan Guancheng Scenic Area (UAV photo) taken on March 17.

Floating dust occurred in parts of the Hexi Corridor in Gansu that day, and Jiayuguan Guancheng was shrouded in floating dust.

(Photo by Zhang Zhimin/Xinhua News)

This is the Jiayuguan Guancheng Scenic Area (UAV photo) taken on March 17.(Photo by Zhang Zhimin/Xinhua News)

On March 17, tourists visited the scenic area of Jiayuguan Guancheng (photo by drone). (Photo by Zhang Zhimin/Xinhua News)

This is the Jiayuguan Guancheng Scenic Area (UAV photo) taken on March 17.(Photo by Zhang Zhimin/Xinhua News)

This is the Jiayuguan Guancheng Scenic Area (UAV photo) taken on March 17.(Photo by Zhang Zhimin/Xinhua News)

This is the Jiayuguan Guancheng Scenic Area (UAV photo) taken on March 17.(Photo by Zhang Zhimin/Xinhua News)

On March 17, tourists visited the scenic area of Jiayuguan Guancheng (photo by drone). (Photo by Zhang Zhimin/Xinhua News)

On March 17, tourists visited the scenic area of Jiayuguan Guancheng (photo by drone). (Photo by Zhang Zhimin/Xinhua News)

On March 17, tourists visited the scenic area of Jiayuguan Guancheng (photo by drone). (Photo by Zhang Zhimin/Xinhua News)

来源：GMW.cn