Sandstorm hits NW China's Gansu (9/9)

A pedestrian wears a kerchief on her head to shelter from a sandstorm in Dunhuang, northwest China's Gansu Province, April 23, 2014. Parts of Gansu was hit by a sandstorm Wednesday afternoon, which reduced visibility to less than 50 meters, according to the provincial meteorological center. (Xinhua/Nie Jianjiang)