Introduction to Nanzheng Street: Among the streets and alleys, the most representative one is Nanzheng Street. Nanzheng Street is a national cultural relic protection unit located in the south of the ancient city. It was built under the leadership of Longguangdian, the magistrate of the Qing Dynasty in the 18th year of Daoguang's reign (AD 1838). The middle of the road is paved with 1-meter-wide bluestone slabs, with a ditch underneath. The two sides are connected in a straight line with 0.8-meter-wide bluestone slabs. The total length is 330 meters and the width is 3 to 4 meters. The total construction area is 17,600 square meters, and there are two crossing gates. at.