Credit card 4000 was returned, showing income (reimbursement) of 4000. What does that mean?

"Deposit 4000 yuan, which proves that you have paid it back. Credit card statements are basically displayed like this. "

The answer of Lucky Pig Children's Shoes above is basically correct. As for why your current display is different from before, it should be caused by the upgrade or change of the banking system. Similarly, the bank can display the detailed purpose as "salary" or "bonus" on the statement.

If you are still not at ease, you can call the bank to confirm.

As long as you do deposit money, the bank has an account to check, don't worry! I'm from the financial system. You can ask me again if you have any questions.