It is Hainan Airline, the forth largest ariline in China, aka Grand China airline for international route. Although, they are not part of any alliance right now, I am expecting it will join oneworld eventually.
they have following advantages:
the only airline sells YUP fare, F class with price of full fare Y
the only airline you don't need to go to ticketing office to get award ticket with passenger ID copy,everything can be done on the phone and soon online
only airline has personal entertainment system on international flight in every seats
180 degree C cabin seats for international flight, also used for SYX to PEK route.
has lowest award requirement. eg. from PEK-HKG in F only cost u 37000km Roundtrip.
Award seat is on request basis and it is very easy to get one, if u r Silver or Gold member, you can get free seats on almost any flights
and many more benefits that other big three airlines don't have.