客运
kè yùn · HSK 7
passenger traffic
🚌 客 guest/passenger + 运 transport = moving passengers; in Taiwan, the intercity bus line
运 — walk radical 辶 + 军 jūn (army)
Originally depicted an army (军) on the move (辶), meaning to transport or move troops. The sense broadened to 'transport, move, revolve' and later acquired the abstract meaning of 'fortune' or 'luck'—what fate moves toward you. The simplified form replaces traditional 運.