I have written before that China can easily find alternative sources of supply for coal. The current high prices for iron ore and wheat are going to be short-live until such time steady shipment of these commodities from other countries can be established. It is unlikely that Australia can find new markets to replace China's.
I have never come across any business person who goes all the way to kill off its major trading partner; worse still the goose that lays the golden eggs that provides Australia of very healthy trade surpluses year after year.
The linked article is basically echoing what I been writing. Unless Morrison can perform miracles, or his Almighty can give him a hand, he has a Buckley's chance to get Australia out the mess.
Thank you for reading.