The usage of Tik Tok's finished food group purchase is as follows:

1. First, go to the offline store for group purchase, and then turn on the Tik Tok on the mobile phone.

2. Select "I" in the lower right corner, then click "Tik Tok Mall" above, and click the first my order.

3. After opening it, you can see a write-off code. Just give this write-off code to the store staff.