Shanghai Immortal: A. Chao

Pawned by her mother to the King of Hell as a child, Lady Jing is half-vampire, half-hulijing fox-spirit and all sasshole. As the King`s ward, she has spent the past ninety years running errands, dodging the taunts of the spiteful hulijing courtiers, and trying to control her explosive temper - with varying levels of success.
So when Jing overhears the courtiers plotting to steal a priceless dragon pearl from the King, she seizes her chance to expose them, once and for all.
With the help of a gentle mortal tasked with setting up the Central Bank of Hell, Jing embarks on a wild chase for intel, first through Hell and then mortal Shanghai. But when her hijinks put the mortal in danger, she must decide which is more important: avenging her loss of face, or letting go of her half-empty approach to life for a chance to experience tenderness - and maybe even love.