Yep, none of the current scenario books have Chinese actions or those involving the Mad Baron. But, as Steve said, look for the STEA rules 3rd edition, which btw will also have a few scenarios inside. :-)
With regard to Warlord China, that is still coming along, though slowly. Just finished one scenario for the early part of the Great Wolf Rebellion (bandits under Bai Lang vs. Chinese regular army units), and will be playtesting that next weekend. Working on a second Great Wolf Rebellion scenario for the latter part, which would involve the bandit forces fighting Muslim troops and Chinese, as they are being forced back (since by that time the tide, and citizens, were turning against them for their looting and rape).
Regards,
Bob