1. Long bank processing time: Due to the time difference between mainland China, Hong Kong and Chinese mainland, the withdrawal operation needs to be processed at Hong Kong Bank in China first, and then through WeChat payment, so the withdrawal time will be longer.
2. Network problem: During the withdrawal process, the network connection will be unstable, resulting in the withdrawal operation not being successfully completed.
3. Account problem: If the card number of Bank of China or WeChat account is abnormal, the withdrawal operation will also be unsuccessful.