1. First, find the Tik Tok client on your mobile phone and click Open; 2. After entering the vibrato short video page, click the option "I" in the lower right corner of the page; 3. After entering the personal interface of Tik Tok, click the three-column sign in the upper right corner of the page to open the personal drop-down menu; 4. In the personal drop-down menu, click the "Settings" option; 5. In the setting menu, click the "Account and Security" option; 6. In the "Account and Security" menu, click the "Apply for Official Certification" button at the bottom of the page; 7. After entering the page of applying for official certification, you can see that there are two certification methods: personal certification and institutional certification. Personal authentication must meet three conditions. As long as you meet the requirements, you can directly click the "Apply Now" button. Enterprise certification needs to click "Quick Review".