I have not read the article but have a few questions based on observations.
A Chinas owned training school is taking over (buying) a current training school in Australia. A very good and very profitable school would sell for a very good sum!
So a marginal school is probably getting taken over, and this possibly the only buyer.
So not a lot of current employment of pilots or ground support staff or tax generation for the government.
--- Deal goes ahead and current owners can pay off debts and have a bit of profit to pay a bit of tax.
Large numbers of people begin to fly creating many ground support rolls, refuelling, engineering, airport maintenance personal and even the coffee shop and all paying tax.
External of the airport requires more accommodation and food, if they build their own accommodation then they need builders. All this generates jobs and taxes.
I don't see any possible way they can ever cut up the land on the buildings they now own and take it back to China.
The best thing to do is work on the laws that allow money to be moved offshore, they can't take the land.