The First Committee refers to the Social Work Committee of Xicheng District Committee, which is responsible for leading and coordinating social work in Xicheng District. The seven departments refer to the District Civil Affairs Bureau, the District Human Resources and Social Security Bureau, the District Housing and Urban-Rural Construction Committee, the District Health and Wellness Committee, the District Veterans Affairs Bureau, the District Emergency Bureau and the District Market Supervision Bureau, which are respectively responsible for civil affairs, human resources and social security, housing and urban-rural construction, health and wellness, veterans affairs, emergency management and market supervision. The "three centers" refer to the district community service center, the district citizens' appeal center and the district community governance center, which are an important part of community construction and governance in Xicheng District, providing community services, solving citizens' appeals and strengthening community governance.