I should marry the traitor

As a well-known anchor of the large-scale male-oriented Chinese style martial arts single-player open world stealth game "Infernal Affairs", Changge Tianya signed up for a 100 million yuan prize speed run competition organized by the production company, but traveled through the game cabin at the speed of light.
In the background, humans mixed with demons in search of power to create powerful hybrids. After artificial selection and training, the top hybrids were like gods, possessing the power to open mountains and fill the sea. They were the pinnacle of the Daqian Dynasty's military power and the foundation for maintaining their rule.
However, in reality, these mixed-race people are the root cause of the disaster. They no longer regard themselves as human beings. They are selfish, cruel, and profit-driven. Neither laws nor morals can restrain them.
As the last prince of the Daqian Dynasty, Li Changge is unaware of the fact that he has traveled through time. Faced with the death of the previous emperor, chaos in the court, demons entering the capital, and the danger of the overthrow of the dynasty, he must flee Luoyang, work hard to practice, fight monsters, explore, and rebuild the world - no way!
How is it possible for an evil speedrun to follow the main storyline?
"Please select your genre."
"Hehuan!"
"Now that my father has passed away, I shall be the Emperor of Daqian!"
Facing the traitors who sent troops into Beijing, Li Changge said: I have had enough of these red tapes, now I want to sleep with these traitors!
"Dear Master Dong"
"I'm very angry now!"
"Your Majesty!"