 Of the many factors threatening their survival today, hunting has had one of the largest impacts.In Nonggang, where it is most prevalent, the natives believe that the langur has medicinal values, and have hunted them to make wine out of their bones, which they believe could cure fatigue and rheumatism.In Guangxi province, an estimated 90% decline in numbers has occurred since the 1980s, a 2002-2003 survey found 307 individuals in 14 populations remained.