Post–LGM, climate warming has fragmented the continuous distribution of species, with a projected continuing trend of fragmentation in the future. Fortunately, high–altitude regions can still host stable potential distribution areas, offering unaffected and highly suitable habitats for species’ continued existence in the context of climate warming. However, warmer climates will accelerate the shrinkage of stable suitable habitats towards higher altitudes. In the HHM, suitable habitats are concentrated in summits, exhibiting notable fragmentation and patchiness (Figure 5).