Refund guaranteed. Dingdang APP is a new mobile application self-service production and operation platform developed by Nanjing Houjian Software Co., Ltd., which supports cross-platform mobile application development. The promotion fee of 198 yuan for Shop Dingdang’s transfer to another store will be refunded if it cannot be transferred within one month. There are certain procedures for transactions on the Dingdang APP platform. If the process is not completed, the other party will not be able to receive the money. During the transaction, the money is on the platform. If the transaction is not completed, the Dingdang APP platform will automatically refund the money.