People ride motorcycles amid sand storm in Hami, northwest China's Xinjiang Uygur Autonomous Region, March 26, 2014. The city was hit by sand storm on March 26. (Xinhua/Polat)

Hami of northwest China's Xinjiang Uygur Autonomous Region is blanketed by sand and dust March 26, 2014. The city was hit by sand storm on March 26. (Xinhua/Polat)

A woman works amid sand storm in Hami, northwest China's Xinjiang Uygur Autonomous Region, March 26, 2014. The city was hit by sand storm on March 26. (Xinhua/Polat)