It is the slogan put forward by McDonald's. McDonald's attaches great importance to creating a unique corporate culture, and puts forward the slogan of superior quality, excellent service, cleanliness and truthfulness, and makes the value embodied in this slogan deeply rooted in the hearts of the people and recognized by all employees. McDonald's is a large multinational chain restaurant in the world. 1955 was founded in Chicago, USA, with about 30,000 branches around the world.