ride bike on the top of city wall

Bike the City Walls. Bicycling around the city walls will take about 2 hours. Bicycles can be rented on each of the four main gates for 120 minutes, ¥45per person, and it may to be returned to any of the other stations (however, be sure to verify this before starting your ride). Remember to take your passport with you as a deposit for the bike that you rent, or ¥200. Make sure that you keep the deposit ticket, as the bike vendor will not give you the deposit back without it! Also - the bikes are generally relatively new and well maintained - however, check the tire pressure and whether the brakes work before choosing yours. You can also rent tandems for 90Yuan for 120 minutes.