The steps are as follows:

1. Open Alipay APP and log in to your account.

2. Enter the "My" page and find it on the bottom navigation bar.

3. In the "My" page, find and click the "Pay Baby Hidden" entrance. This entrance is located in "Financial Management", "Credit Card" or other related locations. The specific location varies depending on the Alipay version.

4. After entering the Treasure Credit Card page, you will see the relevant introduction and function buttons.

5. Find and select the "Activate" button on the page. This will lead to the activation process.

6. Follow the prompts and enter your ID number, mobile phone number, credit card number and other necessary information. Make sure the information you enter is accurate.

7. After completing the information input, follow the instructions on the page to complete the activation process.

8. Carry out additional steps such as identity verification and authorization according to the actual situation. Just follow the prompts on the page.

9. After completing the activation, start using the related functions and services of Ant Treasure Credit Card.