Migratory birds are seen in Chifeng city's Dalinur Lake, in the Inner Mongolia autonomous region. Millions of swans, geese and a variety of migratory birds travel long distances from Lake Baikal to Dalinur Lake in fall each year. When temperatures drop low enough to freeze Dalinur Lake, the birds then fly to Poyang Lake in Jiangxi province to spend the winter. Dalinur Nature Reserve is one of the most important wetlands and sanctuaries for migratory birds in Asia. [Photo by Qi Guangyou/China Daily]