The method of group purchase link on the platform live broadcast is as follows:

1. Open the Tik Tok application, enter the personal center page, click the "…" icon in the upper right corner, and select "Settings" in the pop-up menu.

2. in the settings page, find the "account and security" option and click enter.

3. in the account and security page, find the "my authentication" option and click enter.

4. There will be different authentication types in my authentication page. Select the "I want to authenticate" button to enter the authentication page.

5. In the authentication page, you need to fill in personal information and upload photos of relevant certificates, and wait for approval after submission.

6. After approval, video and live content can be published in Tik Tok application, and links to goods or services can be added.

7. When publishing a video, you can select the goods or services to be promoted by selecting the "Add Tags" button.

8. after selecting the goods or services to be promoted, the system will automatically generate a promotion link, and copy the link into the video description or live interaction.