Here's the English translation of your text:
1. If only two punches are required in a day, only schedule the first time period and leave the second time period completely blank.
2. Time periods must not overlap or conflict. Otherwise, when uploading the setting form, it may cause the machine to restart, display an unknown error, or fail to schedule successfully. For example, in Shift 1, the afternoon shift cannot start earlier than the morning shift.
3. Theoretically, all machines can span across days, but the total duration of a shift must not exceed 24 hours.