The e-coupon can be used in two ways, usually with a digital code and a barcode, as long as you present the e-coupon on your cell phone after you've finished ordering and before you pay for your meal, and scan the code on the McDonald's machine.

McDonald's (McDonald's) is a large global multinational chain of restaurants, founded in 1955 in Chicago, USA, and has about 30,000 outlets around the world. McDonald's mainly sells hamburgers, as well as french fries, fried chicken, sodas, ice, salads, fruits and other fast food.

McDonald's restaurant in mainland China in the early translation of the name is "McDonald's fast food", until the later part of the unified use of the current Hong Kong-style translation of the name. In the private sector, because of the similarity in sound between McDonald's and "Peony House", Peony House is also taken as a nickname for McDonald's, but it is not common.

McDonald's is present in 119 countries on six continents, with about 32,000 outlets, and represents an American lifestyle in many countries. Because it is the first and largest multinational fast-food chain, McDonald's has been the focus of public debate about food that causes obesity, corporate ethics and consumer responsibility representing a fast-food culture that has been accused of affecting public health by, for example, contributing to obesity through high calorie counts and a lack of adequate balanced nutrition.

Many have slammed it as junk food. France prides itself on its food culture, and many are hostile to McDonald's, seeing it as representative of the American lifestyle invasion. In the United States, there is a McDonald's outlet near every highway exit. Wireless Internet access is also available. The McDonald's Happy Meal offers free toys, such as Disney movie character dolls, which are attractive to children.