I have no idea what the person who added the material wants to do, but I just thought the topic was interesting and important. So if they don't do anything, maybe I'll cut down this addition to the Song article to two or three sentences, add links to the mentions of the Salt Monopoly in the Han and Tang articles and to the references in other Song articles. I found a book on the subject which I think I can get hold of. If I get ambitious, I may start a short article on Salt Monopoly (China), maybe with links to the references in French and German history. Thanks.