The CCP used people in Australia to get close to, and pay off, politicians who they thought would be inclined to favor their cause. Every single one of them belonged to the Labor party. I don't think anyone can call this spin, and I don't think any honest person would doubt that the media would be going absolutely bananas right now if all these people were Liberal party. Hell, they even tried to smear a Liberal party politician as a Chinese spy simply because she was a member of an overseas student club, that is how low they would sink.
As for Stan Grant, he has been approached multiple times by both the National party and Liberal party to run for parliament with them. He was then put into the ABC by Ida Buttrose after she came to the ABC with express goal of evening out the extreme left wing bias at the ABC. His purpose at being at the ABC is literally to give a different perspective to their usual stuff.
As for the ABC and Guardian, they are constantly pushing their audience to believe that democracy is deeply flawed. They are also constantly talking about what an amazing economic system China has and that their model is the way of the future. The only reason they are anti CCP in particular is because the entire word-wide left turned anti-China back in January 2019 overnight.