The mid-point rule is understood as follows:
08:00–12:00 13:00—17:00
If a company’s work schedule is as above, then the mid-point for the lunch break打卡 (clocking in/out) is 12:30. The morning checkout should be completed between 12:00 and 12:30, and the afternoon check-in should be completed between 12:31 and 13:00. The mid-point for the afternoon checkout to the next morning’s check-in is 00:30. Cards punched within the same mid-point interval are considered duplicate cards. For work time, the earlier punch is taken, and for break time, the later punch is taken.