Why Three Days Is the Right Minimum
Beijing rewards three days far more than one or two, mostly because of a single fact that surprises first-time visitors: the Great Wall is a half-day-eating round trip on its own, which means any one-day visit either skips the Wall or rushes everything else. Three days lets you give the Wall its own day, the old imperial core its own day, and the living city — hutongs, food, markets — its own day, without any of them feeling compressed.
The order matters less than making sure you don't schedule the Wall for your last day; if weather or smog forces a reschedule (see our Beijing air-quality guide), you want spare days left, not none.

