Robert Farley at LGM sez China should send troops to Lebanon. On the surface, I like it. The Chinese are about as likely as anyone to actually be honest brokers, never mind trying to look like it. Moreover, all sides have a lot to lose by "accidentally" firing on a Chinese mission.
It neatly avoids the US and NATO attachments that would be problematic from the Arab point of view.
For China - if they can pull it off - it gives them two things they want: 1) Operational experience far from China's borders, something any military can use, and 2) It further improves China's standing in the Arab world - and probably elsewhere - while lowering America's. China would be the country that "saved Lebanon" and stood up to the US and Israel, while the US would be the country that let the war start and continue.
I have no doubt that the US will fight tooth and nail against this happening.