1. First, open the Shanxi provincial government procurement website on your mobile phone. After the platform is registered and passed the enterprise identity authentication, users will get exclusive electronic signature and electronic seal.

2. Secondly, enterprise users who use electronic signature enter the signing page, initiate an electronic contract with the signed information, add the exclusive electronic signature or seal, and then complete the willingness authentication and confirmation through face authentication, thus completing the signing of their own electronic contract.

3. Finally, verify the validity of the electronic signature. Users can identify whether the content has been tampered with, the identity of the signer, the signing time and other information only by checking the digital certificate of electronic signature, so as to ensure that the electronic contract signed with electronic signature can be identified and the content cannot be tampered with.