Daily mail had a nice little map.. Not sure how accurate it is. Seems based of the Daily Telegraph which originally broke the story.
View attachment 48675
The Dongdiao-class spy ship entered the 200km exclusive economic zone off the coast of Darwin in August.
www.dailymail.co.uk
Normally you would like some sort of ship tailing them, just keeping and eye on them and monitoring them. They are a long way from home, they could have mechanical problems or get some floatsam stuck in a prop or something. Its doesn't seem like they came particularly close to Australia, they seem more interested in longer range capabilities, well OTH.
Great opportunity to map their vessel, acoustically, electronically. I would avoid using actual combat systems and ships, like Australia is following it with a AOR. Use leased civilian aircraft to overfly it.