The Kuei-jin work more in sync with the Hengeyokai then the Mages do. As the Eastern varient of Mages tend to stay away from the Hengeyokai aside from the near destroyed Crafts (E.G. Wu-Lungs).
As well, it also depends on what area you wish to be. China has more open variety to allow all the types of Hengeyokai, if it was Japan, it'd limit them, the Kuei-jin are in more number, as well as their damned "Gaki" from the tainted Chi from the nuclear fallout from World War II.
But, if you need help, I can aid in Mage, Changeling, Vampire, et cetera's statement for their Eastern Counterparts, I can help.
But as for a Crossover, the most likely two canidates to cross would be Kuei-jin and an Hengeyokai sentai.
And as well a Shih hunter, but the Shih would more then likely would be wanting to kick the supernaturals' asses all the way to Gum San.