Fig. 1

Topographic map of China (using DEM data from SRTM [https://lpdaac.usgs.gov/products/srtmgl1v003/] and produced with ArcGIS 10.8 software).

Topographic map of China (using DEM data from SRTM [https://lpdaac.usgs.gov/products/srtmgl1v003/] and produced with ArcGIS 10.8 software).