![](http://www.ecns.cn/hd/2020/05/06/47c3b5b239074039a52932a1f439ee1f.jpg)
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/ Sun Rui)
![](http://www.ecns.cn/hd/2020/05/06/a523cd713c1540ce937b7e3c9aa94cac.jpg)
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/ Sun Rui)
![](http://www.ecns.cn/hd/2020/05/06/a33a1ce5947a47d6ad8ff1e205e9d04f.jpg)
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/ Sun Rui)
![](http://www.ecns.cn/hd/2020/05/06/2f25ad92f2ff4281a8d9318f766749b8.jpg)
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/ Sun Rui)
![](http://www.ecns.cn/hd/2020/05/06/051c7d94310a44668f004a55d5f29c91.jpg)
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/ Sun Rui)