Minsheng Bank sent me a text message saying that the credit card I applied for was not approved, but I didn't apply for a credit card.

Several reasons: 1, someone applied for a credit card with your identity; 2, someone else's credit card reserved your mobile phone number; It is also possible that this short message is a lie. In any case, I suggest you call Minsheng Customer Service to inquire, or you can check your personal account at Minsheng Bank with your ID card.