Generally speaking, these cards should all be co-branded cards (Minsheng Bank and China Eastern Airlines). As you know, this kind of card will become a customer of two companies at the same time. But generally speaking, when applying for membership, there will be similar provisions: "Allow us to use customer information within a reasonable range to provide customers with more convenient services." You can choose to complain, abuse personal information and invade privacy, but we are P citizens! Complaining is time-consuming and laborious, and finally it is useless for them to apologize verbally and get some points for compensation. If you really don't need it, sell it! Don't be angry!