Select "Leave temporarily". When the library needs to leave the seat temporarily, please select "Leave temporarily" to lock the seat temporarily in order to prevent it from being misjudged as occupying a seat. There are three kinds of temporary leave: temporary business trip (30 minutes), lunch (90 minutes) and dinner (90 minutes). Dining status can only be selected in a specific time period (11:00-13: 00, 16: 00-65438).