Song Dacheng West Gate Site Museum was not in our Yangzhou trip plan, it was purely an encounter. After eating in Yiyuan, I saw an old city wall without going far west, and then walked forward to find the gate. I entered the discovery of a ruins museum. I checked it online. The west gate was built in the fifth generation. It has been through two Songs, Yuan, Ming, Qing and the Republic of China. It has been more than a thousand years. Like the Ming City Wall site in Beijing, it used to have a very important role in the defense of the ancient army. The bricks on the ground are the real old bricks laid in the Song Dynasty, so they can only be viewed from afar. The place is not big, but the historical memory is strong.