After the first-class constructor prints the electronic certificate, he should write his own signature at the personal signature. If the signature is not handwritten or inconsistent with the handwriting of the signed image, the electronic certificate is invalid.

Online certification, a new system for the registration of first-class builders: users need to upload one-inch color photos on a white background, photos of the front and back of ID cards, photos of my signature, photos of holding ID cards and other elements before using the new system for authentication.

First-class constructor is a qualification of the construction industry, which refers to the registered personnel engaged in key positions of general contracting and construction management of construction projects. Construction engineer is a compound talent who knows management, technology, economy, laws and regulations, and has a high comprehensive quality. He should not only have a theoretical level, but also have rich practical experience and strong organizational ability.