In fact, it was not a bad thing to Mo Zhao if Gu Xijiu still had feelings toward Di Fuyi as it would be easier for Gu Xijiu to accept it when he replaced Di Fuyi and possessed his body. Besides that, he could also use Di Fuyi's body to have sex with her.
Mo Zhao has already targeted Di Fuyi's body. However, it was not easy for him to possess it. He needed to torture Di Fuyi's body and soul until its weakest stage before he could do so.
Unfortunately, Di Fuyi had a celestial body. Mo Zhao would have to take at least two years or above if he wanted to control the body completely. Thus, it was easy to explain why he did not feel too disturbed even though his current clone body had so many problems.
