Chinese government even get benefit from FLG in such a way that FLG create a lot oversea Chinese support CPP. Maybe due to FLG members zest behavior.

I don't believe CPP intentionally doing anything manipulating FLG that but there are some conspiracy theory about controlled opposition.

At least there's a very good strategy that attack a political opponent in a very bad way, for example smear in very stupid lies, can actually give the opponent a boost. I haven't seen any real sample of a politician using this strategy yet.