Tik Tok live preview is a function of Tik Tok platform, which can set the live broadcast time and content in advance to attract more viewers' attention. The following are the steps to release the Tik Tok live preview:

1. Open Tik Tok and click the "plus sign" icon at the bottom of the page.

2. Select the "live broadcast" option to enter.

3. After entering the live interface, click the "Settings" option on the upper right.

4. Select the "Live Preview" option below.

5. In the setting interface, select the live broadcast time and preview display mode, and click Save.

6. After saving successfully, you can set the preview live broadcast time.