(1) after obtaining the intermediate vocational qualification certificate of this occupation, continuously engaged in this occupation for more than 4 years, by the advanced formal training of this occupation up to the standard number of hours, and obtain the graduation (completion) certificate.

(2) After obtaining the intermediate vocational qualification certificate of this occupation, continuously engaged in this occupation for more than 8 years.

(3) Obtain the certificate of graduation of this occupation (specialty) from the senior technical school or the higher vocational school with the goal of cultivating advanced skills, which has been examined and recognized by the administrative department of labor security.

(4) After obtaining the intermediate vocational qualification certificate of this occupation for graduates of this or related majors from junior colleges or above, the graduates have been continuously engaged in this occupation for more than 3 years.