Did nothing, but received a large number of dynamic passwords from 95539 almost at the same time?

Maybe someone entered the wrong mobile phone number.

5539 is the customer service telephone number of China Northern Airlines (affiliated to China Southern Airlines). Generally, there will be text messages only if there is a ticket purchase relationship. If you are sure that you, your family and friends have not used it. ...

If not, and you have never used it yourself, you can ignore it.