But whatever we are going to move on. Now what else do we know about the Shang Dynasty? We know that their capital was at Angyang and this was a city that was built differently than the other cities we have looked at in Mesopotamia, the Indus Valley and in Egypt. They are not using brick stones, they are literally using wood. It's a city of wood. And we also know that there was a very strict social class system that developed in the Shang Dynasty. We know that the upper class lived within the city walls.