Some maintenance majors may not need special training, but teach in a way that combines old and new. Other majors may need training, usually 6 months to 12 months. At the base, recruits have to study professionally for three to four months, and then they will be assigned to the maintenance squadrons of various regiments for infield and outfield study and training.
The above information is for reference only, please consult the relevant military departments for detailed study schedule.