Romance of the Jade Kingdom
All manner of classes can be found in the Shenyue Empire, some interchangeably use the Shenyuen name, but otherwise are the same in the PHB. Consult the DM if you wish to add flavor to your class to better fit the campaign setting.
In addition to your class abilities and features, all PC’s are assigned 3 Hero Points per the rules set in the DMG. Every level, the PC’s hero points will reset to 3 plus half your character’s level, rounded down.