Refers to the soldiers who will stay in the army and become non-commissioned officers after training. According to the relevant information of the pre-selected non-commissioned officers, it is known that the soldiers who will stay in the army will become non-commissioned officers after training. Every year, the army selects good soldier from the recruits and veterans to participate in the training of commanding officers in advance, in order to lay the foundation for selecting officers at the end of the year. The training period is three months.