Fig. 1

Geographical location map of the Da-Xiao Liangshan Mountains. The base map is produced using the standard map of the Ministry of Natural Resources (http://bzdt.ch.mnr.gov.cn/index.html), with the approval number GS (2020) 4630, and no modifications have been made to the map boundaries. The maps covered in this thesis we have drawn through the ArcGIS 10.7 (https://www.esri.com/en-us/home) software. Same below.