Shanghai Immortal A Y Chao by A. Y. Chao 9781399717434, 139971743X instant download after payment.

Half vampire. Half fox-spirit. All trouble.
Pawned by her mother to the King of Hell as a child, Lady Jing is half-vampire, half-hulijing fox-spirit & all sasshole. As the King's ward, she has spent the past ninety years running errands, dodging the taunts of the spiteful hulijing courtiers, & 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 & 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 & 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 - & maybe even love.
This richly told adult fantasy debut teems with Chinese deities & demons cavorting in jazz age Shanghai.