I don't understand all these bad reported feelings about domestic chinese flights. I could be true some years ago, especially FM. But nowadays, not at all.
Don't mix airports organisation which are complicated enough, due to sometimes staffs non professional behaviour, and also chinese people behaviour (sometimes .. ok ...forget it) and the comfort and staff in the planes.
In Y , really I don't know. (to crowded, with nightmares queues, sorry) but in F (finally only 2 times Y fares)
I never had any problem : AC, FM, MU, CZ. Chinese style for sure, but if one are there, we don't expect SQ or MH styles. 99% of my flights were on time. I can't say that from AF, LH, LX, KL .... even on middle haul flights.