Comparison of thermally stable regions and topographic constraints within the Chang’E-7 candidate landing area. (a) Regions with subsurface temperatures below 112 K at a depth of 0.18 m derived from the 20 m resolution DEM in Z. Zhong et al. (2025). (b) Regions with subsurface temperatures below 112 K at a depth of 0.18 m derived from the 5 m resolution DEM used in this study. Temperatures below 112 K indicate conditions favorable for long-term water-ice stability. (c) Surface slope distribution calculated from the 1 m resolution DEM. (d) Suggested landing sites that satisfy both thermal (regions satisfying T < 112 K at all depths greater than 0.18 m below the surface) and slope (<8°) constraints. The black ellipse (region A) and the white square (region B) denote two representative candidate landing areas recommended in this study.