The public security bureau sent a text message to explain the source of funds.

What you want to ask is what does the Public Security Bureau mean by sending a text message explaining the source of funds? The description involves bank cards. According to the query of French Open, I received a short message from the Public Security Bureau explaining the source of funds, showing that the user's bank card was involved. After the bank card is frozen by the Public Security Bureau, there will be SMS or telephone notification, and the user will go to the Public Security Bureau to find the staff to verify and explain.