"One Smile, One Change" Care Is Not a Promise. It's Action. “I believe that big changes always start from simple things — one smile, one sincere action, one concrete step. Because for me, care is not a promise, but an action. Together, we make that hope a reality. One Smile, One Change.” Main tagline: “One Smile, One Change.” Supporting tagline: “Care Is Not a Promise. It's Action.” This combination creates a warm yet firm image — demonstrating the empathy of a dentist, as well as the decisiveness of a potential leader.