Rugao City is round on the outside and square on the inside.

Rugao City is divided into an outer city and an inner city. The inner city is surrounded by a moat, forming a square, while the outer city is surrounded by a moat, forming a circle. This is what is meant by "round on the outside and square on the inside." The old city is not large, and when you walk around the city, you will find that when you are about to go to a certain attraction, there are multiple routes to get there. Walking along the path by the river, you will find yourself back where you started. The ancient city is well-preserved. Although it is located in central Jiangsu, the architectural style has the characteristics of northern dwellings. Since the Eastern Jin Dynasty, southern ethnic groups have migrated south, and northern ethnic groups have settled here, forming a unique style.