This is a kind of transference.
Shi Nian couldn't help but recall the behavioral analysis class that day, when Tang Yanqing guided her to analyze Mark: Mark clearly chose to sit next to Zhou Guanghan, which could prove that their private relationship was good, yet Mark never mentioned Zhou Guanghan.
Shi Nian remembered her analysis at the time resulted in two conclusions: either Mark couldn't accept the fact that Zhou Guanghan was already dead; or he felt guilty.
But now that "transference" has occurred, it proves that Mark's situation is more likely the former.
—Their private relationship was too good, so Mark couldn't accept the sudden death of Zhou Guanghan. He began to think Zhou Guanghan was still alive, even merging himself bit by bit into Zhou Guanghan's shadow.
So the girl Zhou Guanghan liked, he had to like too.
But if his situation was the first kind, then the possibility of him murdering Zhou Guanghan would be reduced.
