How long will China Southern Airlines refund by SMS?

3-7 working days. According to the regulations of China Southern Airlines, the SMS refund will be transferred to the original user's payment account, and the specific arrival time is determined by the bank's settlement cycle, which takes 3-7 working days. Headquartered in Guangzhou, China Southern Airlines Co., Ltd. (hereinafter referred to as China Southern Airlines) is the airline with the largest number of transport planes, the most developed route network and the largest annual passenger traffic in China, with blue vertical tail inlaid with red kapok.