Study on Habitat Forest Type and Plant Diversity of Sichuan Snub-nosed Monkey in Shennongjia National Nature Reserve Genetic diversity of Rhinopithecus roxellana in Shennongjia National Nature Reserve as estimated by non-invasive DNA technology Numerical classification and ordination of forest communities in habitat of Sichuan Snub-nosed Monkey in Hubei Shennongjia National Nature Reserve Distribution and population of Rhinopithecus roxellana in Jiuzhaigou National Nature Reserve, Sichuan Province, China