Timeline of all HiRISE and HiRIC observations used in this study, illustrating the observation epochs relative to the Zhurong rover mission status. The terms “active” and “dormant” herein refer to the operational status of the Zhurong rover mission, not Martian dust-activity seasons. The vertical purple line indicates L_S = 230° in MY 36, after which Zhurong entered hibernation. Green shading represents the rover’s active phase (MY 36, L_S < 230°), while gray shading denotes the dormant stage. Circles correspond to HiRISE data and squares represent HiRIC data.