The person chatted with me on ig, and then we become more and more familiar. He said that he felt that I worked hard and did not make a lot of money, so he took me to invest in gold. At the beginning, the amount was small. And later he asked me how about buying more so that the profit would be more. That's why I invested more money, and the person put his funds into my ace. So I don't doubt him. He taught me to buy USTD from merchants on Binance. Then contact customer service to deposit funds to CME and then make a transaction. Withdrawal is the same way. In the previous few times, I did sometimes get money. Later, I think that if I keep the funds, I will earn more in the next transaction. I have accumulated a certain amount of funds so far, so I want to withdraw them. As a result, the customer service could not be contacted, and the loss was about 2222 US dollars. It's just the principal.