::Those are all really good questions, I just don't know the answer to any of them. I've already exhausted my part in helping and defending the Chinese section of the history of gunpowder article. If you look at the talk page for gunpowder, you'll see what I'm saying (although the page was not created by me, most of the written work on China in history of gunpowder is my doing, even some writing for the Islamic world, India, and Europe).