Underrated element of where Jiang Cheng is re: wwx after everything is that they always had a sort of dual relationship. Two different relationship premises, superimposed on one another.
There's the one where they grew up together, as close as brothers, beating each other up and complaining and being one another's closest companions, sharing a bedroom as kids and eating at the same family dinner table, actively encouraged by Jiang Fengmian to interact as equals.
And then there's the one where Wei Wuxian was in service to Jiang Cheng's family. Not as a servant--Jiang Fengmian absolutely refused to do that, even if he couldn't adopt him. But as a disciple of Jiang Cheng's father and recipient of his charity, as Jiang Cheng's future right hand and most trusted subordinate.
It's a vertical relationship, intimate in its own way but with very strict expectations about what obligations flow in what directions; they are not identical and reciprocal as between friends and equals.
(It's my opinion that Jiang Fengmian's core deal was a deep-seated discontent with the hierarchies he was at the top of, without access to any way to actually deconstruct them or even coherently articulate his opposition. Wei Changze was his dear friend, and no one thinks that's a good enough reason for him to treat Wei Changze's son like his own, because Wei Changze was also his servant, and you can't make that circle square. That's not a way you're allowed to love.)
Jiang Cheng and Wei Wuxian were like brothers; Wei Wuxian served Jiang Cheng.
The personal relationship was always the most important one. To them, in their hearts. But it was the other one that was real, that had weight in the world.
And it's important to understand that neither can be held up as more factual than the other, even though they conflict. Both relationships existed, and had power.
So then when Jiang Cheng chose to hate Wei Wuxian and articulate his grudge against him, he chose to do it in the language of fealty. Because as far as he knew, his case there was secure, watertight, and it wouldn't expose him emotionally or politically.
And those are the terms in which he's been condemning him all this time: for abandoning the Sect, for ingratitude, for lack of loyalty.
For fuckups, too, and poor judgment, but some of that now turns out to have been justified and some of it was mostly the fault of enemies behaving badly, or even Jiang Cheng himself allowing himself to be pushed into making unworthy choices.
And it was all for his sake.
The thing, the thing in my opinion, about what Wei Wuxian did, about the core transfer and his silent self-destruction around keeping it secret, is that that is a hideous thing to have done between two people who love each other, as an act of love. Beautiful, but awful. As the man who was like a brother to him, Jiang Cheng has a great deal of standing to object to it.
But as an act of vassalage, it's basically perfect.
If Wei Wuxian were only what he formally was to Jiang Cheng, if he is interpreted through a lens of fealty and obligation, he did exactly what he should have done, and went beyond what duty actually required. And went to his death silently, allowing himself to be judged, taking all the burden on himself rather than let harm come to his lord.
Like, obviously Jiang Cheng was harmed by the part where Jin Zixuan got manslaughtered and Jiang Yanli walked into the line of fire in situations where Wei Wuxian was resorting to violence and probably shouldn't have, but those are one step removed from the core issue. In terms of Wei Wuxian's intentional choices around Jiang Cheng himself, at the times he was feeling betrayed and abandoned Wei Wuxian was in fact being impossibly, poetically loyal, an absolute cliche about it.
But only in terms of the hierarchical form of their relationship.
Which means that even though Jiang Cheng has a lot of reasons to still be mad at Wei Wuxian, his actual complaints that he's centered for thirteen years are basically wiped out by the revelation of Wei Wuxian's sacrifice.
Wei Wuxian was in fact doing the tragic hero loyal vassal thing, which very much includes being misunderstood and slandered by the world. (Chenqing as a name choice absolutely references this expectation, and the idea that Jiang Cheng specifically will never understand that Wei Wuxian was trying to help him first and foremost all along; he is not subtle.)
The debts Jiang Cheng has been spitefully calling in and considering defaulted were already long paid.
So if at this point Jiang Cheng keeps pursuing that same line of rhetorical attack, now that he knows, he'll be putting himself morally in the wrong, and he knows it. But if he pivots to something else, he'll both be signalling the shape of that secret to the entire world and looking like a prize idiot.
Which is already how he feels.
To actually address the remaining grievances between them, which are considerable, would require releasing those safe, open grudges to Wei Wuxian's face and then reclaiming him as a loved one. Which is, one could fairly say, more than anyone could expect.
Which is why Wei Wuxian told him he didn't have to.
Which leaves Jiang Cheng at something of an impasse.
