A meerkat looks at a heating lamp at Chongqing Zoo in Chongqing, southwest China, Jan. 7, 2021. (Xinhua/Tang Yi)

Sulcata tortoises stay under heating lamps at Chongqing Zoo in Chongqing, southwest China, Jan. 7, 2021. (Xinhua/Tang Yi)

Meerkats stay near a heating lamp at Chongqing Zoo in Chongqing, southwest China, Jan. 7, 2021. (Xinhua/Tang Yi)

An orangutan plays at a room with floor heating at Chongqing Zoo in Chongqing, southwest China, Jan. 7, 2021. (Xinhua/Tang Yi)

A sulcata tortoise eats near heating lamps at Chongqing Zoo in Chongqing, southwest China, Jan. 7, 2021. (Xinhua/Tang Yi)

An orangutan plays at a room equipped with floor heating at Chongqing Zoo in Chongqing, southwest China, Jan. 7, 2021. (Xinhua/Tang Yi)

An orangutan plays at a room with floor heating at Chongqing Zoo in Chongqing, southwest China, Jan. 7, 2021. (Xinhua/Tang Yi)

A lizard stays near heating lamps at Chongqing Zoo in Chongqing, southwest China, Jan. 7, 2021. (Xinhua/Tang Yi)

A lizard stays under a heating lamp at Chongqing Zoo in Chongqing, southwest China, Jan. 7, 2021. (Xinhua/Tang Yi)

Lizards stay under heating lamps at Chongqing Zoo in Chongqing, southwest China, Jan. 7, 2021. (Xinhua/Tang Yi)

Sulcata tortoises stay under heating lamps at Chongqing Zoo in Chongqing, southwest China, Jan. 7, 2021. (Xinhua/Tang Yi)

Meerkats stay under a heating lamp at Chongqing Zoo in Chongqing, southwest China, Jan. 7, 2021. (Xinhua/Tang Yi)

A lizard stays under heating lamps at Chongqing Zoo in Chongqing, southwest China, Jan. 7, 2021. (Xinhua/Tang Yi)

Meerkats stay under a heating lamp at Chongqing Zoo in Chongqing, southwest China, Jan. 7, 2021. (Xinhua/Tang Yi)