In the afternoon, I went to the wall of the ancient city wall to surround the old city with a rectangle. It's over 13 kilometers long. I strongly recommend that I rent a bicycle for 45 yuan. It took me two hours to complete a circle of bicycles before I left. It was really beautiful when it was dark and the walls were covered with bright lights. Many locals can choose to come after five o'clock to walk on the wall in hot summer vacation. Enjoy the night view