In reality, there are not many countries that maintain political friendship with China, and these countries largely overlap with Russia, so the buyers of Chinese weapons are very limited.
The final destination of low-end weapons is never something the seller can decide, and it's not something China can decide either. As for the humanitarian crisis caused by these weapons, that's utter nonsense. I can only say that China plays at most a supporting role here; the real protagonist is the United States, which accounts for half of the international arms trade market. Of course, you can argue that the damage caused by American weapons doesn't count as a humanitarian crisis.
