Migratory birds rest on Xingkai Lake on way back to north

Migratory birds search for food on the remaining ice on Xingkai Lake, a border lake between China and Russia, in northeast China's Heilongjiang Province, March 30, 2017. Every day tens of thousands of migratory birds rest on Xingkai Lake on their way back to the north as the weather warms up. (Xinhua/Wang Jianwei)