I've already established a country, but you said I didn't transmigrate. The author is Du Hongchen. This was a fantasy novel about the main character Yang Xu, who established the Daxu Kingdom in the ancient wilderness. Not long after the founding of the country, he would have to face the disputes between races and the challenges of foreign forces. If you like the theme of transmigration, this book is not to be missed. I hope you like this fairy's recommendation. Muah ~😗