Yes he probably defended camps because China buys a lot of Saudi oil. Also China probably supplies Saudi Arabia weapons so they can bomb more food markets and schools in Yemen.
I believe US should stay out of most conflicts because apparently my country does more harm then good usually. I don't mind seeing China or others try take role in policing world because they will probably fail just like we did. Maybe not as bad.
I don't think the world need policing. At least I don't think it is benefitial. And I don't want the Chinese government in the role as world police as well. Luckily so far they don't seem interested in the job.