You can find it in the "My" tab of Meituan APP. The search method is as follows:

1. Open Meituan APP and select the "My" tab in the bottom navigation bar.

2. On my page, you will see an option called "coupon", please click it.

3. After entering the coupon page, you will see a list of various types of coupons, including exclusive for new users, anniversary celebrations, Valentine's Day specials and so on.

4. Please find and click on the corresponding type of 15 yuan to buy the 30 yuan coupon, and read its detailed information (such as validity period, scope of use and use restrictions) carefully.

5. Click the "Get" button on this page to get the coupon successfully.