Slaying the Dragon in the Late Ming Dynasty

In the troubled times of the late Ming Dynasty, heroes competed for the throne. The protagonist travels through the late Ming Dynasty, and after many mistakes, he realizes that it is better to strengthen his own bones than to place high hopes on others, so he builds a righteous army, uses technology to train elite soldiers, slays tyrannosaurs and punishes traitors, and tries to see who is the hero in the world...