C292 Who is the murderer

Lu Yuchen accompanied her every day. He would often accompany her to chat, watch movies, walk, play chess, and even listen to concerts and such.

Huang Rui would come over everyday. Every time she came over, Lu Yuchen would take this opportunity to go to the study room to take care of some important work.

The days did not seem to be different, and the sinister incident had already passed