Please give me some advice. Which authoritative code or standard does the design drawings have to be stamped with? Why not specify it? There are counter-proofs everywhere or local standards?

This problem is indeed quite troublesome, and many colleagues in design institutes have encountered similar confusion. Current national-level regulations, such as the "Construction Project Quality Management Regulations" and "Uniform Standards for Housing Architectural Drawings" (GB/T 50001), do only stipulate that design documents must be stamped, but specific details such as "stamping page by page" or "only catalogs, covers, and drawings" often do not have unified rigid provisions. It is more implemented by local housing and construction departments or construction drawing review centers based on local standards and detailed plan review rules. Different provinces and different design project categories (such as housing construction, municipal administration, industry) may have different requirements. suggest you do this: First check the local implementation details of the "Key Points for Review of Construction Drawings and Design Documents" or the "Construction Project Survey and Design Management Regulations" in your province or city. Usually, there will be a public announcement on the official website of the local Housing and Urban-Rural Development Department. If the project has entered the drawing review stage, directly consult the agency or drawing review teacher responsible for the drawing review. They will have the most authoritative local implementation standards at hand. About "Stamp Page by Page”: The general requirement is that at least every drawing of the design drawings (including drawing catalogue, design description, horizontal and vertical sections, etc.) must be stamped, but the cover and catalog sometimes only need to be stamped once, which is subject to local drawing review requirements. Some design institutes will cover everything for insurance purposes, but the workload is really heavy. Also a reminder, specifications are sometimes updated, such as the new version of "Architectural Drawing Standards" in 2022, so be sure to check the version. If the project involves multiple places, it is recommended that the regulations of the project location prevail.

The core legal basis for stamping design drawings is the "Construction Law of the People's Republic of China" and the "Construction Project Survey and Design Management Regulations" of the Ministry of Housing and Urban-Rural Development. However, there are no national unified mandatory standards for the specific seal style, size, and layout. It only stipulates that "the stamp of the unit and the professional seal of the registered person must be affixed", and the provincial housing and urban construction departments are authorized to formulate the details. Authoritative basis and reasons for lack of it. Only principles are determined at the national level.: Article 56 of the "Construction Law" and Article 33 of the "Regulations on the Administration of Survey and Design of Construction Projects" clarify that "the design document must be signed by a registered architect/engineer and stamped with a professional seal, and it must be valid with the official seal of the design unit." However, the physical specifications of the seal (length, width, font, anti-counterfeiting pattern, etc.) are not specified. Why there is no national/industry standard: The style of the seal belongs to the administrative rules. The Ministry of Housing and Urban-Rural Development has issued many documents (such as the Guangdong Construction Regulations and the Jiangsu Construction Regulations) clarifying that "the supervisory seal shall be cancelled, and enterprises/individuals shall engrave it themselves according to the provincial and departmental templates" in order to streamline administration and delegate power. ； Therefore, the specific size and layout are unified by the Ministry of Housing and Urban-Rural Development of each province (such as Jiangsu Su Jian Gui Zi [2025] No. 5 and the attachment of the Ningxia Construction Department), resulting in "one province being the same" across the country. The registration seal has a unified style: The professional seals of registered architects and structural engineers are uniformly stipulated by the National Registration Management Committee (including numbering rules and validity period correlation systems), but the unit's "special seal for drawings" and "approval seal" are still under local management.

Thanks for your reply. There is no provision in these two articles as you mentioned, nor does it explicitly require the design institute to affix its seal. "Construction Law" Article 56 The survey and design units of construction projects must be responsible for the quality of their survey and design. Survey and design documents shall comply with the provisions of relevant laws and administrative regulations, construction project quality and safety standards, construction project survey and design technical specifications, and contract stipulations. The construction materials, building components and equipment selected in the design document shall indicate their specifications, models, performance and other technical indicators, and their quality requirements must comply with national standards. Article 33 of the "Regulations on the Administration of Survey and Design of Construction Projects" Article 33 The construction drawing design document review agency shall review the content of the construction drawing design documents of housing construction projects and municipal infrastructure projects involving public interests, public safety, and mandatory standards for project construction. The transportation and other relevant departments of the people's governments at or above the county level shall, in accordance with their duties, review the contents of construction drawing design documents involving public interests, public safety, and mandatory standards for project construction. Construction drawing design documents shall not be used without review and approval.