Australia has asked other countries to dispatch planes to assist in the search, including China.
WTF...
again
WTF.
2/3rds of the passengers are your citizens and another country had to ask you to dispatch planes for search.
WTF
Yea...you are making a mountain range out of mole hill...
This is Australia being, oh, how do you say...DIPLOMATIC by making a public statement INVITING China to participate. That's it.
Chinese navy would have gone there, invited or not. It'd be international waters, and have just as much right as anyone to be there. This is just diplomats being diplomatic. Doing their job. You read too much out of that.