When purchasing a ticket of China Southern Airlines or checking in, show the membership card of China Eastern Airlines Miles or enter the membership number. When getting the boarding pass, pay attention to whether the membership number of China Eastern Airlines (starting with MU) is printed on it, and keep the boarding pass of China Southern Airlines and travel itinerary until the mileage arrives. Generally, it takes about ten working days. If it still doesn't arrive after this time, please check the space displayed on the travel itinerary and compare it with the mileage accumulation standard of SkyTeam members announced by China Eastern Airlines. If it is confirmed that it can be accumulated, please contact the customer service center of China Eastern Airlines Miles directly for a solution.