1. Open the electronic certificate issuance form of Hubei Province, find the position where you need to fill in the electronic signature, and click the left mouse button in the position of the electronic signature to pop up the signature box.

2. In the Signature box, select Handwritten Signature or Picture Signature. If handwritten signature is selected, you can use the mouse or stylus to handwritten signature in the signature box. If you choose a signed picture, you can choose a signed picture that has been saved in your computer to upload.

3. After signing, click the "Confirm" button to save the signature. After signing, you can adjust and edit the signature to ensure the clarity and accuracy of the signature. Finally, after completing the complete certificate issuance form in Hubei, save and submit the form.