# How to configure the clock-in time
[中文](/books/bcbe3/page/8dd48)
It can restrict trainees'**joining time for check-ins**, and also restrict trainees'**actual availablecheck-in time**.
## I. Joining deadline
**Function:**Restrict the time for trainees to join the check-in. After the deadline, they can no longer enter/purchase the check-in.
**Example:**If the check-in activity starts in October and recruitment is carried out one month in advance, set the joining deadline as September 30 and the start time of the check-in activity as October 1.
## II. Check-in time
Currently, there are two ways to set the check-in time: 1. Fixed start and end times; 2. Fixed number of days.
**1. Fixed start and end times**
**Function:**Suitable for check-ins with a unified progress. There is a fixed time cycle, and all trainees are restricted by this check-in time range.
**Example:**Activities with limited time, such as the reading plan in January or the daily early rising plan in 2025.
**2. Fixed number of days**
**Function:**Suitable for the check-in mode of learning at one's own pace. The specific check-in times of trainees may vary, but the number of check-in days is the same.
**Example:**To attract traffic, a civil service exam training institution regularly publishes an \[Manual adjustment required\] (Essay writing question for civil service exams) every week. Each participating trainee has only one chance to get the essay \[Manual adjustment required\] (Correction) within a week. The institution introduces a new batch of trainees every week and provides each trainee with 7 days for check-ins, which can achieve the business without repeatedly creating check-ins.