The remains of an early Qing-dynasty walled town at the edge of Lotus Pond, a short walk from the dragon-and-tiger pagodas. Three of the original four gates still stand: the East Gate (Fongyi Gate) is the most complete, with its tunnel passage and a section of curtain wall. The North Gate is built into a modern apartment block. The South Gate has been partly reconstructed.
A small information centre by the East Gate explains the unusual story of the old city, which was abandoned for political reasons in the 18th century. Easy to combine with a Lotus Pond visit — the gates lie within a 20-minute walk of the dragon pagodas.