It's an interesting angle, but I would be more confident were the source something other than Red State, a notorious right wing rag. They can't resist conjecturing that one of the main pieces of intel that the alleged defector has provided has to do with Hunter Biden's computer. Total lack of credibility.
The whole thing sounds too fanciful to me, I just remembered your comment when I read about it. I think it might be clumsy US disinformation - the dailybeast article mentions the rumours spreading through the anti-CCP Chinese media. Dong’s defection was raised by Chinese officials last March at the Sino-American summit in Alaska, according to Dr. Han Lianchao, a former Chinese foreign ministry official before defecting after the 1989 Tiananmen Square massacre.