First thing that struck me is how many Chinese made weapons are being used by Ukraine and some by Russia.
Looking them up seems some were first designed in Russia by now made in China?
Edit: I would guess it's labelled Soviet when it's unclear which side the equipment come from.
Now, more speculation on my part, it seems very likely that China could subsidize weapons manufacturing to bolster the manufacture of weapons in its own country, and to be part of the feedback loop on what is effective and what is not and not have to be directly involved in the battle itself.