Documentary is a technical person who is responsible for the compilation, collection, arrangement and file management of engineering project data. The librarians need to pass the post qualification examination organized by the relevant state departments and obtain the corresponding certificates before they can engage in the work of related posts. Documentary examination registration is organized by the Provincial Housing and Construction Department or the Municipal Housing and Construction Committee. The specific examination registration time refers to the document notice of the Construction Committee of that year. Registration time varies from place to place. After passing the examination, the qualification certificate of the documenter post uniformly printed by the housing construction department or the housing construction Committee will be issued.