From the JACC website ....
The Australian Government has provided around (AUD)$90 million as part of Australia's contribution to the search for Malaysia Airlines flight MH370, including (AUD)$60 million towards the cost of the underwater search effort.
The total cost of the search is around (AUD)$200 million.
The People's Republic of China contributed around (AUD)$20 million in the form of funding and equipment.
Malaysia agreed to fund the balance of the costs, of around (AUD)$120 million, associated with searching the 120,000 square kilometre search area.
I think China's level of monetary contribution to the underwater search was pretty poor, seeing as the largest majority of the pax on MH370 were Chinese.
It's a fair indication that China cares little about loss of its citizens. To be expected, I guess, when you have so many billions of them.
Don't forget that Australia has gained some pretty extensive seabed knowledge of an area that was previously largely unexplored, and a big unknown.
I also have little doubt that a lot of undersea search experience was gained from the search, which would provide pretty useful guidelines and processes for future searches, for aircraft lost in remote areas of the seas.
The revised crash zone for MH370 by the CSIRO is indicative that all the JACC/ATSB calculations on distance travelled were wrong - despite vast amounts of input by so called "specialists" and "experts".
The indications are now that the aircraft was suffering from excessive drag, probably caused by some kind of damage to fuselage or wing panels, which led to increased fuel burn or a lower cruise speed.