What does it mean that the personnel to be recruited occupy the personnel establishment and are managed according to the personnel agency policy?

Personnel agency is a new personnel management model established to meet the needs of the socialist market economic system, and it is the basic form of personnel management socialization. The employing unit or individual entrusts the personnel service agencies affiliated to the personnel department of the government to handle personnel affairs, including personnel file management. The personnel service agencies provide relevant personnel agency services for the employing unit or individual in accordance with certain legal procedures and policies, using socialized service methods and modern scientific management means.

So what you mean by this question is that the personnel recruited this time are managed according to the personnel agency policy.