One day
Start by walking a stretch of the Ming city wall for the views over the old city, then descend to explore the Ming-Qing streets — the Rishengchang and other exchange banks, the county yamen, the City Tower, the temples and guildhalls — with a combined ticket. Have a knife-cut-noodles-and-Pingyao-beef lunch, wander the lantern lanes and courtyard houses in the afternoon, and enjoy the lit streets at night from your courtyard guesthouse.