Opening Tik Tok Select Alliance can be operated according to the following steps:

1. Log in to the background of Tik Tok merchants and enter the "Selected Alliance" page.

2. Click "Apply to Join" and fill in relevant information, including store name, main category, contact information, etc.

3. After the application is submitted, Tik Tok merchants will review it in the background, and the selected alliance authority will be opened after the review is passed.

4. In the background of Tik Tok merchants, you can set the parameters such as the advertising space, advertising form and bid of the selection alliance to prepare for advertising.