The Last Days of Hong Kong by G.D. Penman
Book 3 in the Witch of Empire series
In the aftermath of the war, Iona “Sully” Sullivan has lost everything; her job, her friends, her fiancé and even her magic. But when an old friend shows up on her doorstep, offering her the chance to undo one of her long litany of mistakes, there is still enough of the old Sully left to get her on the first boat to Hong Kong. A stranger in a strange land, Sully must navigate alien customs, werebear chefs, the blossoming criminal underworld, religious extremists, Mongol agents, vampire separatists, and every other freak, maniac or cosmic leftover with an iota of power as they all compete for a chance at the most valuable prize in all the world; a little sailor doll named Eugene, and the last wish on earth.