Why did Greater China Gold suspend trading? Is there any inspiration behind this? How to protect the interests of investors?

One of the reasons for the company's closure is that mainland agents messed up the market, customers complained to the trading hall, the company closed down and the manager was dismissed.

As for the hidden problems and the interests of investors, I can only say that the key point lies in your own ideas. Up to now, customer funds in Greater China can still be traded and deposited normally. As for the good and bad problems that happened later, no one can guarantee the protection of interests. I suggest you make your own decision, find a safe place to stay, and then make arrangements when things really come out. Everything depends entirely on your own behavior. If in doubt, keep asking questions.