I recently took a flight with a QF number but actually run by China Eastern (MU). When I checked in at BNE and tried to have my boarding pass issued for the MU flight (originating from SYD), it could not be done. After 2 more Qantas desks in Sydney, I eventually managed to obtain the boarding pass at the MU desk in a remote part of Sydney International terminal. The MU business-class on-board service was about as good as economy in premium airlines: for example, an apparently extensive lunch menu but in fact only one of the printed offerings was actually available. Further, fortunately I speak basic Mandarin, because the cabin attendants had even less basic English. Never again with QF/MU.