In the Hong Kong and A-share markets, those who can consistently make money are either gambling gods or cheaters.

So, I basically don't use a USD account to buy Hong Kong stocks. Questions that are too difficult are indeed hard to answer.

Yes, it's like in the end, investing isn't about who can score 60 on a difficult exam, but about who can first find that simple exam with a perfect score of 100 and an average score of 95, and be qualified to enter.