I didn't link Wikipedia because people like you tend to jump on links to Wikipedia with big brain takes about how the article is probably controlled by whoever their boogeyman is.
Both the articles I linked, SCMP which you dismissed because it has China in its name and Daily Telegraph are from the Wikipedia article references if you care to look.
There is nothing to be skeptical about in terms of my sources. There is at this point no credible evidence he was the high level Chinese defecting spy he was presented as initially (just like they're presenting this one). At this point, it would be incumbent on anyone claiming he is a high level defecting spy to prove it, because even the Australians realized they were had and gave up on suggesting that. Or maybe not so much had as no longer useful for their purpose of pushing a narrative.