What does it mean to successfully reverse punch a long pass code?

When riding, the reverse scanning unblocked the code successfully. Long-pass code reverse punching is a new function to solve the difficulty of scanning code and checking health code for the elderly, children and other people who don't have smart phones or have difficulty in operation. Passengers only need to carry the printed paper version of the long pass code, aim at the code scanning area of the card reader, and then they can automatically carry out relevant inspections. After passing the inspection, it will show that the card punching is successful. Automatic identification of passenger code color, nucleic acid detection and other health information is convenient, fast and time-saving.