The top exchanges all have their own risk control departments, which will control risky accounts by banning accounts or taking C3 measures. So, what kind of accounts will be frozen by the exchange risk control:

1. Only buy U every day, but do not sell U, and withdraw cash after buying.

2. There are no virtual currency trading assets in the account, but the currency is charged and U is sold every day.

3. The bank card of the currency trader is frozen due to unclean sources of funds, and has been reported by the currency trader many times.

4. The currency trader did not pay with real name, and was reported by customers many times.

5. The account assets are involved in cases. (This is a "judicial freeze, and the relevant law enforcement departments have issued a "letter of assistance" to the exchange)

6. Accounts with too much assets. (This type of situation is usually a rogue act of small exchanges, directly encroaching on customer assets. Relying on their own overseas operations, they have no scruples.)

7. Accounts that receive "black coins". (This "black coin" is not tracked by the law enforcement departments involved in the case, but by industry leaders to recover losses. For example, hackers steal coins, scammers steal coins, etc.)

8. Using high technology to harm the interests of the exchange. For example, brushing orders and moving bricks, or taking advantage of the benefits of the exchange's promotional activities.