Non-commissioned officers directly recruited are: fresh graduates of ordinary colleges and universities, whose majors meet the needs of the army, unmarried, and male age is no more than 24 years old (as of July 3 of that year1); Political and physical conditions shall be implemented in accordance with the provisions on the recruitment of conscripts.
If you want to know more details about the direct recruitment of non-commissioned officers, I suggest you consult the relevant recruitment documents.