Prince Zhenguo: Go to the Guillotine at the Beginning

A modern man with a science major, travels back to ancient times to become a prince, and starts in hell mode? See how I survive from desperate situations, steal a dragon and turn into a phoenix, become a traitor in the court, fight for the right to be the heir, the rivers and lakes are stormy, and the war between nations... Overcoming obstacles all the way, he finally became the greatest tyrant in history!