Hiding behind that door, pretending not to notice anything, he can still be the Prince of Taiping.
Push the door open, ask questions, and avenge his mother. He can be his mother's son.
But he can't do both. He can't let go of power and family affection.
So he became Gong Jiu, a person named Gong Jiu. '
Intention: I would like to see Shuangfeiyan