Since nobody ever "regret" or "disapproves" the use of US-made weapons against innocent civilians, then the same standard should be applied to China-made weapons too.
Actually officially China never cares. She sells to both Iran and Iraq during their conflict. As many have already said it is the finger on the trigger that is responsible, not the weapon.
western morality is a western weapon
My guess that China would rather prefer that their weapons are use only for deterrence purpose but once a weapon is sold is very difficult to control were is going to end.
Still, its different when RSF is using HJ-12E which is top line stuff, instead of 3rd line surplus.
Just accept it as a tragedy and a reality of the world. If they don’t have Chinese arms, they’ll get other nations’ weapons. If they miraculously get no weapons at all, they’ll use sticks and stones. At the end of the day, this conflict is an ethnic one, and history has countless examples of such conflicts. Until they find a common cultural ground that can supersede their inter-ethnic ones, they will always find a way and excuse to kill each other.