1. Open the e-sign electronic platform of Sinopec, and enter the account number and password to log in.

2. In the main interface, select the contract document to be signed and confirm the identity information of the signer.

3. According to the requirements of the contract, choose appropriate signing methods, such as handwritten signature and electronic seal.

4. During the signing process, you can check the signing progress and status at any time.

5. After signing, the signature record can be saved in the platform for subsequent query and management.