I just clicked through to a guardian link that talked about why she was initially convicted. It’s harder to pin down exactly what misinformation she was accused of spreading though since most western outlets are causally dismissive of the claims.
That said, this guardian article references interviews she did with VoA, an American government outlet, and The Epoch Times, a far right wing outlet run by the Falun Gong cult. The Epoch Times I know in particular has promoted antivax or anti lockdown conspiracies in the US, as well as other stuff like with Qanon and the idea that Trump actually won in 2020. It wouldn’t surprise me to know she was promoting similar anti lockdown conspiracies but just in China.
Don’t worry, Biden just imposed tariffs on Chinese EVs so they can rest easy now.