Panmen Scenic Area is located in the southwest of the ancient city of Suzhou, covering an area of 24.86 hectares. Ruiguang Tower, land and water gate, and Wumen Bridge are all key cultural relics protection units in the country. Panmen was built in the Spring and Autumn Period. It is one of the eight city gates in Suzhou City. It was first built as "anus gate", and then changed to "panmen" due to the staggering return of land and water.