First of all, we don't refund. First, we need to see if the merchant promised a seven-day unreasonable refund when you bought the training class. If the merchant does not say that there is no reason to return the goods after seven days of training course support, then the merchant in JD.COM will refuse to return the goods for a refund. If there is no reason to return the goods after seven days of training course support, JD.COM Mall will not refund it, then we can complain to JD.COM Mall.