1. People who disregard everything about TFA, to remind everyone for the five hundredth time about <some unrelated crime by CPC>, and <why are we still trading with them>, and <can't we just build a wall around it>, and <the Chinese come here to steal all our things>. These posts, depending on how inflammatory they are, or what side of the bed HN woke up on, tend to hover slightly positive.
2. Green-named accounts speaking in... Non-perfect English, praising some aspect of China. These usually get downvoted to oblivion.
There's also a lot number of posts that express more-reasoned/more-on-topic pro/anti-China viewpoints. I don't consider them to be trolling, and I don't really care what colors the names of the people posting them are.
And while they may have a point, they're often off-topic whataboutism. I believe it's a natural outcome of gamifying discussions with imaginary internet point rewards. The first and most eloquent post that's congruent with the hivemind "wins". It's just human nature.