A white-headed langur and its cub forage at a nature reserve in Chongzuo City, South China’s Guangxi Zhuang Autonomous Region, May 25, 2016. The white-headed langur is a critically endangered langur, with a population size estimated at about 1,000 individuals. The primate is known to live in Chongzuo’s nature reserve. (Photo: China News Service/Luo Yingyi)

A white-headed langur and its cub forage at a nature reserve in Chongzuo City, South China’s Guangxi Zhuang Autonomous Region, May 25, 2016. The white-headed langur is a critically endangered langur, with a population size estimated at about 1,000 individuals. The primate is known to live in Chongzuo’s nature reserve. (Photo: China News Service/Luo Yingyi)

A white-headed langur and its cub forage at a nature reserve in Chongzuo City, South China’s Guangxi Zhuang Autonomous Region, May 25, 2016. The white-headed langur is a critically endangered langur, with a population size estimated at about 1,000 individuals. The primate is known to live in Chongzuo’s nature reserve. (Photo: China News Service/Luo Yingyi)

A white-headed langur and its cub forage at a nature reserve in Chongzuo City, South China’s Guangxi Zhuang Autonomous Region, May 25, 2016. The white-headed langur is a critically endangered langur, with a population size estimated at about 1,000 individuals. The primate is known to live in Chongzuo’s nature reserve. (Photo: China News Service/Luo Yingyi)

White-headed langurs forage at a nature reserve in Chongzuo City, South China’s Guangxi Zhuang Autonomous Region, May 25, 2016. The white-headed langur is a critically endangered langur, with a population size estimated at about 1,000 individuals. The primate is known to live in Chongzuo’s nature reserve. (Photo: China News Service/Luo Yingyi)