1 / 4   Photos taken on Wednesday show that the giant ice wall is melting as temperatures rose in the spring on Xingkai Lake, the border lake between China and Russia in Mishan of northeast China's Heilongjiang Province. /VCG Photo

2 / 4   During winter, ice chunks piled up, forming an ice wall that extended dozens of kilometers on the edge of Xingkai Lake. /VCG Photo

3 / 4   The ice wall can be up to over 20 meters high, stretching along the eastern side of the lake. /VCG Photo

4 / 4   As the Xingkai Lake’s surface area is about 4,380 square kilometers, the melting process will take a month, after which the migratory birds will return to its habitat here. /VCG Photo