Shen Biran spent too much time on Gu Qingyuan, and all that time amounted to nothing, which is what frustrates her the most.
If she knew from the start it would end like this, she wouldn't have done it.
Moreover, she did it for Gu Qingyuan's sake, hoping he could steer clear of Lu Xiao's grasp.
Lu Xiao wouldn't care about Gu Qingyuan's life or death; if Gu Qingyuan lost all value, Lu Xiao would use his own means to resolve the misunderstandings between him and Shen Biran.
But Shen Biran genuinely doesn't want to involve outsiders; her own issues have troubled her for many years, and after all this time, she sincerely doesn't want to see any reason, no matter how unclear what it should be.
If that were truly the solution, then there would be more problems in the future.
At this time, if what you want to see are things of this kind, then that's most important.
Gu Qingyuan doesn't want to see it, yet it's precisely what he has to face.
