2. People who participate in virtual currency/blockchain transactions and have investment behavior.
3. The bank card account has funds to enter and exit the online gambling platform or purchase illegal online lottery tickets.
4, engaged in foreign trade transactions, bank card accounts to collect foreign trade payment.
5. Conduct foreign exchange transactions through unofficial channels.
6. Receive remittances from other strange third parties.
7. The cardholder receives funds from an acquaintance, but is implicated because the bank card of the remitter is frozen.
8. Other special circumstances, such as participating in pyramid schemes, capital entry and exit, etc.
Legal basis: Article 205 of the Procedures for Handling Criminal Cases by Public Security Organs can ask witnesses and victims on the spot, or at the unit or residence of the witness or victim or at the place where the witness or victim put forward. When necessary, witnesses and victims may be notified to testify in public security organs.