The ancient city wall was built in Tang Dynasty for four years, surrounded by mountains and rivers, reflecting the ancient superb architectural skills and immortal artistic value of China. Now the well-preserved city wall is nearly 3,000 meters, with 12 city gates, "pillow mountain and stream for city", forming a unique pattern of "mountain in city, water in city" and "foddha hanging beads". In 2013 it was listed as a key cultural relics protection unit in the country.