First, click the Prizes button located at the top right of your screen.
Next, select the Use Codes tab, input your gift code, and click the Exchange button. You will then receive the following items: 1） HP Pool x1 2） MP Pool x1 3） Transform Potion x1 4） Xianyang Scroll x5
Notes: Promo codes may only be used once per server. Rewards obtained from the gift code are bound, and will be delivered directly to your backpack.