It has been put in your vouchers and benefits. Ok, now I'll teach you how to find the paper you received. Operate Xiaomi K30, Aauto faster version11.2.10.5267.

1. Open the vending machine faster and click on the three horizontal lines in the upper left corner.

2. Click on the automatic express store.

3. Find benefits and coupons after going in.

4. After entering the page, click Use.

The above are my specific steps, I hope to help you.