Why Did His Royal Highness Betray the Country?

Li Mingyuan traveled through time and became a useless prince. I thought I was about to start a life that turned against the wind, But he never wanted to lie down and become a prince. Fifth Prince: Seventh Brother, don't panic, if anyone bullies you, Fifth Brother will help you beat him! Third Princess: Seventh Brother, sit tight, Third Sister is there for everything! Ninth Prince: Seventh Brother, I support you! Li Mingyuan: Even if I'm a traitor, I won't let you have an easy time! Thus, the intrigue between Li Mingyuan and his brothers and sisters began...