Built on the site of the old Tang-dynasty wall, Zhōnghuá Gate has four rows of gates, making it almost impregnable, and could house a garrison of 3000 soldiers in vaults in the front gate building. When walking through, observe the trough in either wall of the second gate, which held a vast stone gate that could be lowered into place.
Horse ramps lead up the side to the wall; also note how the roads immediately north of the gate follow the circular line of the now missing enceinte (瓮城; wèngchéng), a further fortification.
