According to the relevant data of Baidu Law Pro, non-commissioned officer schools must obtain graduation certificates and corresponding skill level certificates before they can participate in the promotion of second-class non-commissioned officers. If you only get the certificate of completion, you will not meet the promotion conditions and cannot be transferred to the second-class sergeant.

A certificate of completion is an academic certificate, usually issued by a school or training institution, which is used to prove that students or trainees have completed their academic requirements in a certain course or training program and reached the corresponding academic performance and ability level.