Every promotional code is subject to specific redemption conditions, such as a validity period and minimum order value, cannot be combined with other promotional codes, or is only valid for certain items. If the promotional code you entered is not recognized by the system, check if your order meets the validity criteria. If the promotional code is rejected again, verify if all characters were entered correctly. For example, you might have entered the letter "o" instead of the number "0" or the letter "I" instead of the number "1". If the code is rejected again, please contact our customer service.