Brothers, the scariest thing about withdrawing U is being invited by the "uncle" for tea after your card gets frozen. Don't panic, remember the response strategies to the three core questions below, which can help you stay calm and easy to cope.

First question: "Do you know that virtual currencies are illegal?"
Never admit it foolishly! You can reply like this: "The law does not explicitly state that buying and selling U between individuals is illegal. I understand this transaction is not protected by law, but not being protected does not directly equal illegal; this is just personal asset disposal." - Remember, it's important to hold this bottom line.
Second question: "If you took dirty money, you have to return this much to get out, understand?"
Don't be scared and agree to a full refund right away! At this moment, you can leave a room for negotiation: "The refund percentage can be discussed; it’s not that I’m completely unaware of the situation and will just accept whatever you say. I’m willing to cooperate, and let’s see if we can negotiate a reasonable plan with the victim’s side. Once we reach an agreement, it should be resolved, right?" — This way, it shows a willingness to cooperate without putting yourself in a difficult position, avoiding being taken advantage of.
Third question: "If you don't unfreeze it, you won't be able to use your other cards either, and you'll still have a record!"
Don't be fooled by this! You can calmly state: "I have prepared all the materials, and I will definitely cooperate actively with the investigation. Currently, the card is only frozen during the investigation stage, and I haven't been sentenced, so where's the criminal record? As long as my card is not a primary card directly receiving fraudulent funds, it generally will not affect the normal use of other bank cards." - This response will let the other party know that you understand the situation and cannot be easily misled.
But to be honest, sometimes you really understand after going through a round. Just like those few lines that were written:
In life, one does not cultivate good results, only loves to speculate on coins and set fires.
Suddenly seeing the frozen card seal chain, it's hard to distinguish the cause and effect of the dirty money.
Oh! With the sound of handcuffs, the case file arrives, today I finally know that I am myself.
Finally, let's emphasize that prevention is key compared to how to respond afterwards! Before trading, be sure to take some time to review the other party, check if their account and transaction history are reliable. Don't find it troublesome; it's a life-saving charm.