Beijing Card Expiration Reminder Mode

Hello, I would like to ask what is the way to remind you of the expiration of the Beijing Pass? The way to remind you to enter Beijing is SMS. Because your phone number will be recorded when you apply for the Beijing Pass, when your Beijing Pass expires, the staff will send you a SMS reminder through the phone number you left to let you know that the Beijing Pass has expired, so the way to remind you that the Beijing Pass has expired is SMS reminder.