A woman walks on pebbles with a pet puppy in her arms on the riverbed of the Yellow River in Lanzhou city, northwest China’s Gansu province on March 8, 2015. The riverbed of the Yellow River was exposed due to decrease in water supply from upstream which usually occurs in February and March, giving rise to collection of unique stones, a tradition that has a history of several hundred years. (Xinhua/Chen Bin)
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