Photo taken by infrared camera on Nov. 16, 2017 shows a wild leopard in Baizha forest farm of Nangqian County, Yushu Tibetan Autonomous Prefecture, northwest China's Qinghai Province.

Lalu wetland national nature reserve, with an altitude of about 3,600 meters, covers an area of nearly 13 square kilometers.

Groups of bar-headed geese retuned to the Lhasa river valley where they spend the winter season in November.

Groups of black-necked cranes forage at the Lhasa river valley where they spend the winter season, southwest China's Tibet Autonomous Region, Nov. 23, 2017.

From oxygen generation, temperature control to humidification, various methods have been implemented to accommodate animals to plateau conditions at the zoo.

Decorative lights are illuminated during a light festival at Nanshan park in Lhasa, southwest China's Tibet Autonomous Region, Nov. 23, 2017.

Local authority organized the three-day winter livestock products fair by the side of Qinghai-Tibet highway, to increase income for the herdsmen.

People visit the multimedia exhibition "Van Gogh Alive" at Megaron Concert Hall in Athens, Greece, on Nov. 21, 2017.