1. User registration (signed by bank U shield): the entrusted agent, legal representative and all shareholders log in to the "Yunnan Market Supervision Online Service Hall" through "User Login" to register individual users. 2. User login: Enter the "Yunnan Market Supervision Online Service Hall" and click "User login". Select any login method: 1 Click "Industrial and Commercial Liaison Officer" to log in. Click on "Electronic Business License" to log in. 3. Change (filing) registration: according to the application requirements, apply for change (filing) in the operation interface. 4. Digital signature: 1 Entrusted agents, legal representatives and all shareholders can choose "blockchain cloud signature" (mobile phone electronic signature) or apply for personal "account U shield" in the bank for electronic signature. (The two signature methods can't be mixed. Everyone should make sure to sign with the same signature method. ) 2 Shareholders download the electronic business license in the WeChat applet and electronically sign for the enterprise. 3 Changing the legal representative of the enterprise also requires downloading the electronic business license in WeChat applet for electronic signature. 5. Background approval and submission: After the above operations are completed, log in and submit (refer to step 2). 6. Get a new photo: After the backstage approval of the county market supervision administration, the entrusted agent will bring the original and duplicate of the business license to the approval window of the county market supervision administration for a new photo.