Here is a VOX article (of all places) about ...
"How China used Facebook and Twitter to spread disinformation about the Hong Kong protests"
There have long been concerns about China’s social media disinformation capabilities, but we haven’t really seen them put them into action until now."
How China used Facebook and Twitter to spread disinformation about the Hong Kong protests
" .... Twitter uncovered more than 900 accounts originating from the People’s Republic of China that were “deliberately and specifically attempting to sow political discord in Hong Kong,” the company said, and an additional network of 200,000 accounts that were part of a broader spam campaign. Facebook subsequently said it found seven pages, three groups, and five accounts it believed were involved in “coordinated inauthentic behavior” out of China focused on Hong Kong. More than 15,000 accounts followed at least one of the pages, and about 2,200 joined one of the groups. Facebook’s discovery was based on a tip from Twitter...."