Is the procuratorial service guarantee center a secondary institution of the procuratorate?

No, take Inner Mongolia as an example: the procuratorial service guarantee center is a public welfare institution, which is subordinate to the People's Procuratorate of Inner Mongolia Autonomous Region. It is a public welfare institution that undertakes procuratorial services of hospital organs, comprehensive government services, logistical support of organs, dispatching of property vehicles and other related work assigned by organs of the people's procuratorate of the autonomous region.