
Migratory birds fly over Bayanbulak Wetland in northwest China's Xinjiang Uyghur Autonomous Region in Spring. Photo:China News Service

Swans fly over Bayanbulak Wetland in northwest China's Xinjiang Uyghur Autonomous Region in Spring. Photo:China News Service

Migratory birds rest at Bayanbulak Wetland in northwest China's Xinjiang Uyghur Autonomous Region in Spring. Photo:China News Service

Migratory birds fly over Bayanbulak Wetland in northwest China's Xinjiang Uyghur Autonomous Region in Spring. Photo:China News Service

Migratory birds rest at Bayanbulak Wetland in northwest China's Xinjiang Uyghur Autonomous Region in Spring. Photo:China News Service