UNDER HEAVEN by Guy Gavriel Kay.  

Probably the finest fantasy book inspired by ancient Chinese history and mythology written by a Western author is Under Heaven by Guy Gavriel Kay.  Learn more here 

 And while you are here, have a look at A Jade Treasury. One of my own books about the legends and myths surrounding Jade, the Stone of Heaven. To ancient cultures all over the world it was sacred. In China, Confucius raved about it; wars were fought over it and cities were offered in exchange for a piece of it. The ancient Olmecs of Central America treasured it far more than gold. Maori were so fond of it they killed and ate ten British sailors who tried to steal some of it.  If you want to know about the pirates who poisoned a man to get hold of it or how many slaves the Inuit would swap for a piece of it, then this is the book for you. BUY IT HERE.   https://amzn.to/4aIVAbZ