A Tibetan fox and her cub are seen playing in Tianjun county, northwest China's Qinghai Province. Tibetan fox, a species restricted to the Tibetan Plateau, is known for its smiling face.Photo:China News Service

A Tibetan fox and her cub are seen playing in Tianjun county, northwest China's Qinghai Province. Tibetan fox, a species restricted to the Tibetan Plateau, is known for its smiling face.Photo:China News Service

A Tibetan fox and her cub are seen playing in Tianjun county, northwest China's Qinghai Province. Tibetan fox, a species restricted to the Tibetan Plateau, is known for its smiling face.Photo:China News Service

A Tibetan fox and her cub are seen playing in Tianjun county, northwest China's Qinghai Province. Tibetan fox, a species restricted to the Tibetan Plateau, is known for its smiling face.Photo:China News Service

A Tibetan fox and her cub are seen playing in Tianjun county, northwest China's Qinghai Province. Tibetan fox, a species restricted to the Tibetan Plateau, is known for its smiling face.Photo:China News Service