What procedures are required for design changes during project construction?

Specifically, as for what changes occur in various industries, generally the work related to the Development and Reform Commission, environmental protection, and safety all needs to be redone

The original poster didn’t explain clearly; I thought it was about a change order

Design changes vary depending on the circumstances; the requests for engineering changes may come from the project owner, the design firm, or the construction contractor. To ensure project quality, different procedures are followed for implementing project changes and clarifying or modifying design drawings, depending on the circumstances. (1) Requirements of the construction contractor and handling thereof 1) Handling of requests for technical modifications When the contractor submits a request for a technical modification, it shall submit a \"Project Change Order\" to the project supervision agency; this form should specify the contents and reasons for the requested modification, along with drawings and relevant documents. Technical modification issues can generally be addressed by a professional supervision engineer, who brings together the contracting party and the on-site design representatives; after agreement among all parties, a memorandum is signed and served as an attachment to the change order, which is then implemented upon approval by the chief supervisor. 2) Requirements for project changes: The contractor shall fill out a \"Project Change Form\" regarding the issues that require changes, and submit it to the project supervision agency. Upon the application of the contracting unit, and after consulting with the design and construction parties as well as the contracting unit itself and making a decision regarding the change, the chief supervision engineer issues a \"Project Change Order\", which shall be accompanied by the revised design drawings submitted by the design unit. After receipt by the contracting unit, construction shall be carried out according to the revised drawings. (2) Handling of changes proposed by the design unit: 1) The design unit first submits a “Design Change Notice” along with relevant attachments to the project owner. 2) The project owner, together with the supervisor and the construction contractor, examines the “design change notice” submitted by the design firm; if necessary, the design firm must provide further information in order to make a decision regarding the change. 3) The chief supervision engineer issues the ‘Project Change Order’. The “Design Change Notice” issued by the design unit shall be attached to this “Project Change Order”, and the construction contractor shall carry out the work according to the revised drawings. (3) Handling of change requests from the project owner (supervising engineer): 1) The project owner (supervising engineer) shall notify the design unit of the change request; if corresponding plans or suggestions are included in the request, they should also be submitted to the design unit ； Otherwise, the change request shall be studied and resolved by the design unit. In the change request submitted for review, a list of all drawings and documents affected by the change shall be provided. 2) The design unit studies the ‘Project Change Order’. 3) Authorized by the project owner, the supervision engineer examines the proposed design change plans submitted by the design unit or its opinions on the plans accompanying the change requests; if necessary, they conduct studies together with the relevant contractors and design units, and may also provide further information to facilitate a decision regarding the change. 4) After the project owner makes a decision to make changes, the chief supervision engineer issues a \"Project Change Order\" to instruct the contractor to carry out the construction in accordance with those changes.