Classification and dynamic changes of the Zhurong plume-disturbed zone. (a) Various regions with distinct change characteristics after landing. (b) Image captured by the Navigation and Terrain Camera (NaTeCam) (HX1-Ro_GRAS_NaTeCamA-F-003_SCI_N_20210521002414_20210521002414_00058_E.2C), where dark-purple arrows indicate dark-colored regions and light-purple arrows denote bright-colored regions. (c) Digital orthophoto map generated from NaTeCam images; dark-purple arrows point to the dark-colored altered regions observed by NaTeCam, which correspond to the bright-colored altered region (Region D) in remote-sensing images. (d) Remote-sensing images acquired by Tianwen-1 prior to the Zhurong rover’s landing (HX1-Or_GRAS_HiRIC-CCD1-F_SCI_N_20210326171219_20210326171301_00018_A1 and HX1-Or_GRAS_HiRIC-CCD2-F_SCI_N_20210326171219_20210326171301_00018_A1). (e)–(o) Images after relative reflectance calculation. (p) Dynamics of relative reflectance.