I agree it's a little odd that there was no reference whatsoever regarding the trade visit, but, as we know MAG is much better at just getting on with it behind the scenes.
Regarding Hainan, I've posted similar on the EDI thread, but apparently tour operators are able to book seats on the new EDI-MAN-PVG flight. Saga is apparently the main one so far, booking seats for their new China cruise itinerary, but I've not been able to view said seats/itinary thus far.
As for Air China, I'd be sceptical until it's announced, given they have sat on the rights with no usage for years. Plus, a B77W? I don't see it unless a cargo contract is being sought.