The PRC will try to find closure but not real closure, my guess is they will report day after day stalling tactics, seas too rough, cannot pinpoint up close, currents are unpredictable etc.
They want closure but assuming for a moment they already know where plane is and the sensitive location plus they are not noted at having any form of a SEAL team 6 or such they are helpless to form a Search and rescue in any way compared to how the US can.
passengers that may be in an Iranian holding facility may very well be SOL at getting rescued unless its a NATO rescue.
Obama will not authorize another Pakistan type of raid like Zero dark Thirty, Muslims will protect Muslims.
And this is the complete crux of the whole situation, keeping Muslim attention away, mute it, destroy it, hide it, divert it away from any Muslim cooperation across the board.
Now the more Muslim scrutiny, more pencil beam spotlights on key Muslim connections and then things will break open.
But you got to remember that Malay also has “oil resources” which would bring interest by China, plus PRC is NOT a neighbor you want to get let’s just say a bit “upset” .