Carbon footprint evaluation research on the tourism transportation system at tourist attractions: a case study in Hengshan Growth release determination and interpretation of Korean pine and Koyama spruce in Shengshan National Nature Reserve, Heilongjiang Province, China Correlation of comminution degree and astragalus polysaccharides yield in Mt. Hengshan Astragalus membranaceus Remote sensing and GIS based comparison of land-use classification methods and data mining for degree of land degradation: a case study in Leilongwan Area, Hengshan County, Shannxi Province Ecological niche study of constructive species of the vegetation ecotone of temperate grassland and warm-temperate deciduous broad-leaved forest —Taking the vegetation on the south and north slopes of Heng Mts. Shanxi for example Growth responses of broad-leaf and Korean pine mixed forests at different successional stages to climate change in the Shengshan Nature Reserve of Heilongjiang Province, China Ecological studies of vegetation in the ecotone between temperate grassland and warm-temperate deciduous broad-leaved forest of Hengshan Mountains, Shanxi Polysaccharides Extraction and Comparative Analysis on Antioxidative Activities in vitro of Hengshan Astragalus and Lycium barbarum Two new species of Epimedium (Berberidaceae) from China Forest Community Structural Features of Jincheng Mountain in Nanchong Region in Jialing River Basin