1. Open Meituan APP and click "Takeaway" to enter the takeaway page.

2. Click "Gourmet" on the takeaway page to enter the gourmet merchant page.

3. Click on the merchant to buy and enter the merchant product page.

4. Select the goods to be purchased and click "Go to Settlement" to enter the settlement page.

5. Select the coupon number on the settlement page and click "Submit Order" to enter the payment page.

6. On the payment page, select Meituan payment method for payment. After the payment is completed, the extra package coupon will be used successfully.