Excuse me, what is the reason for not receiving the security message (campus clock-in)?

Maybe the child didn't swipe the card or the child's card was broken, or maybe there was something wrong with the school sign-in system. For those who don't swipe their cards, you can urge your children to swipe their cards. If the card is broken, you can contact the class teacher to make up the card. It may also be that the phone number is wrong or the message cannot be received because of the mobile phone itself. When the system is busy, it may also cause delay in receiving information.