QUOTE(StrangleLove @ Oct 23 2005, 03:43 AM) [snapback]4766958[/snapback]
You can find out everything you would possibly want to know about Chinese gunpowder and firearms development by reading Joseph Needham's "Science and Civilisation in China" Volume 5 Part 7 (The Gunpowder Epic) which I have in my hand right now. It has more information and illustrations than you can shake a firelance at. Check it out at your nearest university library. I've read it cover to cover 
Unfortunately I found several heavy mistakes in J. Needham's accounts. They were done in respect of metal treatment in Song-Ming China and those mistakes made me to prefer original sources.
Best regards,
Alexey.