The book 'Sound of the World: The Peerless Illusionist' had the characters of Southern Tang and Northern Yu. I strongly recommend this fantasy romance-Eastern fantasy novel to you. It tells the story of the protagonist, Ziyin Beiyu, who transmigrated to another world and became a peerless illusionist. Among them is the character of Nantang Beiyu. I hope you like this fairy's recommendation. Muah ~😗