Chu Yifan is a special existence to Chang Qing, and a very special existence.
Chu Yifan was none other than Su Yiyi's half-brother, Chang Qing's first love, and Chang Qing's fiancé. Later, Chu Yifan became Chang Qing's heartache and the thorn in Chang Qing's heart that he accidentally buried.
This thorn pierced very deep. Chang Qing used to pierce it very hard, and stubbornly thought that the wound had healed, and even seemed to have forgotten the existence of this person.
But the deeper the thorn is penetrated, the sharp thorn at the top is always accidentally left in the deepest part of the wound. Even if the surface is healed, there will still be an indelible pain when touched slightly.