Liaohekou National Natural Reserve Wetland is on the one of the three migratory routes for birds across the globe. Millions of birds, up to 281 kinds, migrate to the wetland in spring and autumn each year. The year 2023 witnessed the rising temperature earlier than previous years, so the first flock of red-crowned cranes migrating northward arrived at the wetland in advance. They either soar in the blue sky or gently dance in the reed marsh, showing the vitality of this wonderful place.