The time for officers to go out to study varies according to the content of study. General professional training lasts for three months, six months and one year. If the intermediate training, half a year, one year. If you take other studies for one year, three years will be different. Undergraduate soldiers are promoted and trained in school for one year; College students have been admitted to military schools for two years; Soldiers with high school education take four-year undergraduate exams and three-year junior college exams. Under normal circumstances, the minimum service life of a platoon leader is 8 years, and two years will be added to each post in the future.