A flock of wild ducks swim on the half frozen Aksu River in northwest China's Xinjiang Uyghur Autonomous Region, adding beauty to the river in winter. Photo:China News Service

A flock of wild ducks swim on the half frozen Aksu River in northwest China's Xinjiang Uyghur Autonomous Region, adding beauty to the river in winter. Photo:China News Service

A flock of wild ducks swim on the half frozen Aksu River in northwest China's Xinjiang Uyghur Autonomous Region, adding beauty to the river in winter. Photo:China News Service

A flock of wild ducks swim on the half frozen Aksu River in northwest China's Xinjiang Uyghur Autonomous Region, adding beauty to the river in winter. Photo:China News Service