A man pushes his tricycle amid heavy sandstorm on a street in Xining, northwest China's Qinghai province March 30, 2007. Sandstorms will hit most parts of northern China in the next three days, the China Meteorological Administration (CMA) forecast, with temperatures expected to drop by four to eight degrees Celsius in most parts of northern China and by up to 12 degrees in some areas. [Reuters]

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