1. First, open the nailing client on your mobile phone. 2. Then enter the nailing page, select "My", and then select the personal center indicated by the arrow. 3. Next, select "Business Card Authentication" in the upper right corner of the page. 4. After entering the business card authentication page, select "Personal Authentication" at the arrow. 5. Then on the authentication page, you can choose "ID card authentication" or "Alipay authentication". Let's take authentication as an example to demonstrate. 6. Then enter your ID information and click "Confirm and Submit". 7. Then collect my face according to the page prompts. 8. Then upload your ID card according to the prompts. 9. Next, the authentication is successful.