PS: I've been downvoted on HN for years and years for mentioning this topic. Once, someone even summoned dang. One would think that by now, with this being out in the open (why did "China H2Oh" fail again? lol) but no..threat actors gone act.. Those smart enough to listen to words of someone with nearly five decades in the Business might not lose as much money as those who don't.
Not the person you are asking but there are indeed Chinese cops in the USA that harass and threaten Chinese expats and even threaten to hurt or arrest their family members back in the mainland. It is a violation of our nation's sovereignty but some cities are very slow to arrest them if they even try.
Here [1] is one example of a couple Chinese police in NYC but I can not find the links to the groups in Los Angeles.
Oh I understand some countries do these kinds of operations, but as a general rule your government has far more power over you than a foreign government. Obviously relevant if you are an expat etc