FIGURE 4 Distribution of potential suitable areas of T. chinense . (A): Current distribution range ; (B): The distribution range and dry and wet areas of T. chinense in China, among which 1-4 represent: 1: humid area, 2: sub-humid area, 3: semi-arid area, 4: arid area; (C): The proportion of suitable areas of different grades ofT. chinense in each vegetation areas in China, where the abbreviations represent: CTCFR: Cold temperate coniferous forest region, TCADBMFR: Temperate coniferous and deciduous broad-leaved mixed forest region, TGR: Temperate grassland region, TDR: Temperate desert region, WTDBFR: Warm temperate deciduous broad-leaved forest region, HCVRQTP: High cold vegetation region on the Qinghai Tibet Plateau, SEBFR: Subtropical evergreen broad-leaved forest region, TMFRR: Tropical monsoon forests, rainforest region.