Zhou Li?' "The local official" says: "People hold the land of precious stones and cassiterite, but it is forbidden to keep it. If you take it at the right time, you will get it according to its map. "Attached is a special mineral distribution map." Zhou Li? Summer view? Sima Zai: "The map of Kyushu is well known for its mountains and rivers." There is a special traffic route map. In addition, thematic maps such as tomb distribution map and city map have appeared.