I know music at this stage of development is not as important as other features but I think you should use some music from Emperor Rise of the Middle Kingdom, done by Jeff van Dyck (known for excellence) as most of it fits perfectly with the mod's setting, particularly in battles. I just feel that some of the orchestral songs fit in more in Empire/Napoleon rather than in c.100-200AD China.
E.g. Sunset Ceremony & Himalaylan Echoes are perfect for the march stage in battle.
http://jeffvandyck.com/games/emperor...iddle-kingdom/