Mu Xichen and Mu Che did not get along at all.
As Li Beinian and Mu Xichen approached Mu Che's study, Butler Mu Yun smiled at the man and said, "You're back. Sir has been waiting for you."
Mu Xichen walked past Mu Yun without a word.
Li Beinian smiled and thanked him. "Thanks for the trouble."
"You're most welcome." Mu Yun obviously didn't like Li Beinian very much and one could tell from how the smile on his face became a little frosty.
Li Beinian could sense it, but she brushed it off and quickly followed behind Mu Xichen.
When they entered the study, they saw Mu Che, in his reading glasses, sitting behind the desk.
Upon seeing Mu Xichen, he immediately set aside the documents in his hand and said, "You're back."
You're back.
Just like Mu Yun, the way he said it made it sound like Mu Xichen was someone who had only temporarily left home.