我国现役士兵按兵役性质分为义务制士兵和志愿制士兵。义务制士兵称为义务兵,服役期限为两年,第一年军衔为列兵,第二年军衔为上等兵。志愿制士兵称为士官,服役期限至少三年,一般不超过三十年,年龄不超过五十五岁。士官也属于士兵军衔序列,但不同于义务兵,士官是部队教育训练管理的基本骨干、装备和技术保障的一线人才、密切官兵关系的重要纽带。 According to the nature of military service, our active duty soldiers are divided into volunteer soldiers and volunteer soldiers. Compulsory soldiers known as the compulsory service, the length of service for two years, the first rank of the military rank and file, the second rank is the superior soldier. Volunteer soldiers are called non-commissioned officers. Their term of service is at least three years, generally not exceeding thirty years and not exceeding fifty-five. Non-commissioned officers also belong to the rank of soldiers rank, but different from the compulsory soldiers, non-commissioned officers is the basic backbone of the army’s education and training management, equipment and technical support front-line personnel, an important link in close relations between officers and soldiers.