Introduction to the ancient city wall: After more than 900 years of continuous repairs and reinforcements in the Southern Song, Yuan, Ming, Qing and Republic of China, Ganzhou City formed a tall and majestic ancient city wall with a circumference of 13 miles. It is fully equipped with moats, wall stacks, towers, police stations, horse faces, cannons and other facilities. Its winding heights form a wonderful contrast with the beautiful river water. It is the largest and best-preserved brick and stone city wall of the Northern Song Dynasty in my country.