Always walk by the river, and you won't get your shoes wet.

U was called away for tea by "Uncle Hat," what should I do! Remember the approach to these 3 questions, it can help you stay calm.
First question: "Virtual currency trading is illegal, don't you know?"
Don't panic and admit to the "illegal" label! You can say: "I've checked, and the law doesn't explicitly say that buying and selling U personally is illegal. I understand this transaction isn't protected by law, but 'not protected' isn't the same as 'illegal.' I'm just managing my own assets." — This is the bottom line, don't back down.
Second question: "You took dirty money, you must return this much to unfreeze!"
Don't just nod and agree when someone tries to scare you! Keep a backup plan: "The refund ratio can be negotiated, it's not that I was completely unaware and you say a number. I will cooperate for sure. Can we negotiate a reasonable plan with the victim? Once we agree, it should be unblocked, right?" — This shows cooperation but doesn't make you look like a "big fool."
Third question: "If you don't unfreeze, all your cards will be blocked, and you'll have a record!"
Don't get scared by the "record"! Respond calmly: "I'm ready with all the materials and will cooperate actively with the investigation. The frozen cards are just during the investigation phase, not convicted yet, so no record. As long as my cards aren't directly involved in receiving scam funds, generally it won't affect the use of other cards." — Let them know you know your stuff, and it won't be easy to fool you.