I am beginning to wonder if N. Korea will send more of them, for more cash probably paid by Russians, Chinese, or Iranians. They undergo field training in China or Russia, and then are sent to Syria by sea or air. China would be happy to make this kind of arrangement.
I’m honestly surprised China hasn’t sent a significant expeditionary force, if only to make trained troops into veterans. They have a surplus of males, and don’t have to consider anyone’s sensibilities. It would seem to be a windfall for them, like some of the participants in the Spanish Civil War.