McDonald's oh McDonald's card is a kind of monthly card purchased, after the purchase of the card will return 18 yuan vouchers, there will be free delivery of food rights and interests, there will be exclusive preferential packages. The McDonald's OH McDonald's card is a card that was introduced for the workplace to have benefits such as 60% off breakfast and free delivery. Not really, look at how long you buy oh mcard shelf life, and then the use of authority is not the same, 60% off breakfast and medium latte are only used once a day, other benefits, then you can basically unlimited, you can look at the use of the rules. McDonald's this membership card has a temporary, preferential characteristics, it is used in a certain period of time, you can get preferential services, but more than this period of time will expire.