Around chapter 10 we see their super cute past. After this flashback they basically go alone, the both of them together on a ghost hunt. Hashtag couple goals with cute worrying about injuries and everything. They bang in the last few chapters and only confess like 90% into the novel.
He is elsa, tsundere ice king. DAMN CUTE. He used to be those stuck up, up and coming pride of the clan cultivator. (His sect is super strict and rigid.) Then Wei WuXian crashes into his life in a study exchange programme and annoys the heck out of him. The hall monitor he is can't STAND the MC. Yet after towards the reborn MC, he is super tolerant. It gets a bit heartbreaking when we see clues all around that he missed the MC very very dearly.