The last time I went to the wall, I didn't know there was another museum, so I didn't go there. In fact, the ticket of the wall included the museum. To go to the museum alone this time, you have to buy another ticket for the wall. But after the visit, I feel very valuable, because I have been very interested in Tang Chang'an City, this visit is to the appetite, the development of city walls, Tang Chang'an City Square System, learn a lot.