1, open the mobile phone management12123app;

2. Enter the login account and password, and click Login;

3. Select the "More" option on the home page to enter;

4. After entering the business center page, click the "Select Brand" option;

5. Then select the "New Car Selection" option;

6. Enter the new car number selection page, select the registered province and city, and click "Confirm Information";

7. After clicking the confirmation information, the business description page will pop up. The owner will read the relevant information carefully and click "Read Agree";

8. Enter the information filling page, fill in the vehicle information, and then click "I confirm that the information is correct".