White-headed langurs are only distributed in a very narrow triangle between Zuojiang River and Mingjiang River in China, with an area of less than 200 square kilometers. Only Shanghai Zoo and Guangzhou Xiangjiang Wildlife World have artificially raised white-headed langurs. Huang Chengming, a researcher at the Institute of Zoology, Chinese Academy of Sciences, said that in this case, it is very important to protect the white-headed langur. If the white-headed langur here is extinct because of careless protection, it marks the complete disappearance of the white-headed langur on the earth.
Although the number of langurs is still rising, and with the joint efforts of nature reserves and relevant experts and scholars, their breeding trend is also improving, but their protection should not be taken lightly. For example, in the drought in Guangxi in 2009, it was very difficult for white-headed langurs living in karst mountainous areas to drink water. Huang Chengming said that although the annual precipitation in the residential area of the white-headed langur can reach 1900-2000 mm, as long as the rainfall stops, the rain will soon flow along the cracks in the karst rocks to the underground river. If the drought lasts for a long time, their drinking water will be a big problem. In order to solve the drinking water problem of the white-headed langur, many researchers and animal protectors went up the mountain to send water to the white-headed langur and set up water supply points.