After withdrawing money from the ATM machine, half of the money will be withdrawn. If you do not withdraw it, it will be swallowed back into the machine. If there are no other people around, it is usually stuck. Please contact the customer service of the bank where the ATM machine belongs, leave your contact information, keep the transaction credentials, and wait for notification from the bank after processing. If you suspect that your bank card has been taken away by others, you can temporarily report the loss by phone first, and then remove the bank card after you find it.