Regarding this situation you can refer to news items: https://www.japantimes.co.jp/news/2020/04/10/asia-pacific/taiwan-chinese-trolls-racism-who/

Or to the wiki as a starting point https://en.wikipedia.org/wiki/50_Cent_Party

Went through some videos on youtube that explained how this was researched and the data. BUt you ahve to look for that yourself. Also dive deeper into the Chinese 50cent party. This isn't the first time that they are put into action for defamation and troll campaigns. Wen't through so many informational videos the past week that it will take me a solid 30 minutes to find that singular source again.

This is another video discussing this subject https://www.youtube.com/watch?v=WZCnLveJ-Ko. But it is more biased than I would like my sources to be.