From the back of the book:
The Emperor is dead, his realm split into three kingdoms. Warlords, bandits and powerful families run amok. Only China's proud heroes stand between the people and utter chaos.
Jade and Steel is a d20 system supplement providing for high adventure in these troubled times. Add six new Chinese classes to your d20 fun: the Alchemist, Dim Mak (Touch of Death) Pracitioner, Diviner, Geometer, Iron Hand Disciple, Sword Saint. Nine new feats help create that wire-fu spirit.
Is your ch'i sufficient to the task? Head for the Pearl Festival of Pai-San and find out!