Here's how to use Promo Code when shopping at Xiaomi: Log in to your account information or create a new account, select your favorite products and add them to the cart. At the same time, you can view the products you want to buy in the shopping cart. Then, click Pay, select the corresponding available Coupon Code, and select your preferred payment method. Please note that each Xiaomi Coupon has its own rules of use, if your order is eligible for mi.com, it can be used.