What certificate does the machining center need for recruitment?

The recruitment of machining center requires the operation certificate of primary machining center. To obtain a certificate, you must pass the primary formal training of this profession to reach the required standard hours, and obtain a diploma, and have been engaged in probation work in this profession for more than 2 years. After obtaining the primary vocational qualification certificate of this occupation, he has been engaged in this occupation for more than 3 years continuously, and has reached the standard hours stipulated in the formal training of this occupation intermediate level, and graduated. After obtaining the primary vocational qualification certificate of this occupation, he has been engaged in this occupation for more than 5 years continuously.