I received a credit card from Shanghai Bank, but I didn't apply for it myself. What should I do?

If what you describe is true, it should be a bank mistake or someone else's fraud.

If the credit card issuer is really Shanghai Bank, it may be that the bank sent the wrong address when mailing it to other credit card customers, but the probability of this happening is low.

If the credit card issuer is not Shanghai Bank, it is someone else's fraudulent means. I suggest you call the police.