The interior design construction drawing is stamped with the official seal, and then it needs the signature of the designer, checker, approver and approver to be used normally.

Interior design is to create an indoor environment with reasonable functions and meet people's material and spiritual needs by using material and technical means and architectural design principles according to the nature, environment and corresponding standards of buildings. This kind of space environment not only has the use value and meets the corresponding functional requirements, but also embodies the spiritual factors such as historical context, architectural style and environmental atmosphere. Clearly take "creating an indoor environment that meets people's material and spiritual needs" as the purpose of interior design.