Yea, I was a bit confused about that part too. Since this scene is added by the scriptwriter, I'm not quite sure what hidden message she's trying to depict. One certain thing is the fact that the study room that TongXue designed for Mu Zhenfei looks very similar to Mo ShaoQian's study room. My guess...ShaoQian is shocked to see the similarity, but then why didn't he look happy when he found that TongXue copied the design of his study room into her project?