* Grade level: Primary school, middle school, and high school all have slightly different schedules.
* Region: School calendars can differ slightly between provinces and even individual schools.
* Specific school policies: Some schools might have slightly longer or shorter schedules due to their own internal calendar.
* Holidays and festivals: The number of official holidays and festivals varies from year to year.
While a typical range might be around 200-220 days, it's impossible to give a precise number that applies to all Chinese students.