There used to be a Huobi exchange, can it still be used?

Today, my friend chatted with me and said that during the Chinese New Year, he wanted to convert the virtual currency he held into legal currency, but his bank card was frozen. He quickly contacted the bank and went to the offline branch to inquire about the reason. It turned out that it was frozen by criminal investigation in another place. The bank gave a contact number. After calling, it was answered by the police in a certain place. The police said that the merchant was involved in telecommunications fraud and the funds involved flowed into the account, so it was frozen. When encountering such a thing, he confessed the truth and could only blame himself for being unlucky to run into a bad merchant.
Another friend of mine was investigated when he was withdrawing money. He just got bail pending trial. According to the current situation, he will at least be convicted of assisting information network criminal activities. Whether he will be sentenced to prison or not is not the point. The key is that leaving a criminal record will affect several generations. From his perspective, it is really miserable. He has been investing money in it before, and basically lost money in liquidation. This time, he finally seized the opportunity to make some money, but he didn't expect that there would be problems when he withdrew cash. He himself said helplessly that he was fine when he lost money and liquidated, but he was targeted as soon as he made money.