The Chinese have performed limited peacekeeping operations in Africa, although they didn’t do a good job keeping the peace when crap hit the fan. See the link below.
https://amp.theguardian.com/world/2016/oct/06/un-peacekeepers-refused-to-help-south-sudan-rebels-raped-aid-workers-report
Which I think is a major case in point on why the effectiveness of peacekeeping from an outside force is questionable at best. Israel can mobilize 500,000 troops, they’re not going to be deterred by a few thousand Chinese peace keepers. On the other side Hamas is a terrorist organization, a few thousand peacekeepers are going to be too thin to stop an unconventional attack. Hamas will just kill civilians where the peacekeepers aren’t stationed.