1. Download official McDonald's applications (such as McDonald's mobile app) and register your account, or get redemption coupons on the official McDonald's website.

2. Select the electronic coupon to be used in the application or website and add it to the shopping cart or favorites.

3. Go to McDonald's store and enter the ordering session.

4. When ordering, inform the cashier that you have electronic coupons and show them to the cashier. Under normal circumstances, electronic coupons will have corresponding redemption codes or QR codes.

5. The cashier will scan or enter the redemption code to confirm the validity of the redemption voucher and deduct the corresponding amount or discount according to the contents of the redemption voucher.

6. After the payment is completed, you can enjoy the corresponding discount or preferential treatment.