The Vassal King Rises, Who Says I Am a Useless Prince?

[Alternative History] + [Decisive Killing] + [Farming] + [Harem] Cheng Wenjin traveled through time and became a useless prince of the Dajing Dynasty, who was demoted to a remote fiefdom. What's even more unfortunate is that there is a barbarian invasion at the beginning. In the crisis, the feudal king's rebellion system is awakened, and he uses his own power to repel the enemy and gain fame. From then on, the rise of the feudal king begins! When the capital city of Jinling opened to him again, what greeted him was not contempt, indifference and murderous intent, but a thunderous cry... "Long live King Yan!" "Long live the Emperor!" This is the story of a feudal king's self-rebellion and rise. … Ps:: This book is also called "On the Self-cultivation of the Rebellious Domain King"