A tower crane is seen in sand storm in Lanzhou, capital of northwest China's Gansu Province, April 10, 2006.(Photo: Xinhua)

A man rides a bike in sandstorm on a street in Turpan, northwest China's Xinjiang Uygur Autonomous Region, on April 10, 2006. A heavy sandstorm hit Turpan on Monday. (Photo: Xinhua)

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