Legal analysis: professional subcontracting engineering data should be signed by the general contractor, and all data should be sorted and filed by the general contractor. However, the project with strong professionalism can be signed and sealed by the person in charge of the professional subcontracting project, and then submitted to the general contractor for signature and seal for the record.

Legal basis: Article 29 of the Construction Law of People's Republic of China (PRC), the general contractor of a construction project may contract out some contracted projects to subcontractors with corresponding qualifications; Except for subcontracting agreed in the general contract, it must be approved by the construction unit. In the case of general contracting, the main structure construction of the construction project must be completed by the general contracting unit itself.