"Historical Records of the Seventeenth Duchayuan in the Qing Dynasty" for example: "After the red book was issued, two copies were recorded by the undergraduate for historians' notes and kept by the department for editors' notes."
The role of official documents:
The role of laws, regulations, guidance, guidelines, contacts, vouchers and historical materials.
The role of laws and regulations. State and confirm laws, regulations and other binding contents. Guiding function. Convey the orders and intentions of superiors, and direct and guide the work. Publicity function. Propagandize the truth, clarify the meaning, and carry out propaganda, education, mobilization and enlightenment.
Contact function. Exchange of information, exchange of information between superior and subordinate, parallel and non-subordinate organs. Voucher function. The written basis for contacting work matters and conducting official activities lies in keeping records, so that the effectiveness of official documents can break through the time and space restrictions and be accurate. The role of historical materials. Truly record the activities at that time and become reliable historical materials after filing.