Bai Chen knew that this room should have been used by Yu Ming to rest while they were away from the Xinyang Imperial Palace. After they arrived at the inn, he, Yu Ming, and Wu Jingguo did not go directly to their respective rooms but instead gathered in Yu Ming's room.
They briefly discussed their investigation tonight, but then Yu Ming said that they should continue the discussion in the morning, and that was why Bai Chen went to his room to rest his weary body and mind.
He remembered that Wu Jingguo was also with him and Yu Ming when they talked in the room, but he didn't expect the Crown Prince to stay in the room after he left, and that man even did something so intimate with Yu Ming in the room until dawn.
Why did he suddenly feel betrayed? Oh, perhaps it was because it looked like he was none other than a mosquito for the two men, and the two men could only have fun when he left the room a few hours ago.