There is such a group of OTC merchants in the market who will release frozen cards for you all the time, causing you to worry about card closures. Their purpose is very clear, allowing you to find them to cash in. The profit is about 5% (the profit of U merchants on the exchange is 0.5%), or to promote What they call cards, wallets... everything is just business. So what to do? How can retail investors withdraw funds safely?

1. Why is the card frozen and how to solve it?

Bank freeze, judicial freeze

The former is because your card use triggers the bank's internal risk control, causing the bank to freeze. In this case, the bank will generally unfreeze it automatically after 3 days. Some banks require you to go to the counter to unfreeze. It's okay, just go. If someone asks, the other party will ask. Your own source of funds? To put it bluntly, investment income is enough.