1 / 4   As the weather gets warm, the ice in the Xingkai Lake is gradually melting, which attracts a flock of migratory birds to fly back to their home on Sunday. /VCG Photo  

2 / 4   As one of the biggest wetlands in the world, Xingkai Lake, located in the city of Jixi, northeast China’s Heilongjiang Province, is an important habitat for over 300 rare bird species in China, including the red-crowned cranes and oriental storks. /VCG Photo  

3 / 4   Every year when the spring comes, thousands of migratory birds arrive at the lake on time. The rice fields and the lake provide a great place for the birds to rest and seek food. /VCG Photo

4 / 4   Due to the excessive land reclamation, the lake used to have decreasing amount of migratory birds flying back in the past. However, as the local government adopted effective solutions to protect the wetland, the migratory birds returned back. /VCG Photo