I sat on the bench of the bus shelter and waiting for the bus. Suddenly, I was attracted by the children’s songs on the opposite advertisement screen. A group of children sang “Clap Song” for the audience in the auditorium. What a pure and wonderful vocal tones! I felt the calm that I have never experienced before. After the children’s singing performance, the audience applauded the children singing. Then the children politely bowed to the audience. I really wanted to listen to it again. At this time, the bus was coming. I got on the bus, sat on the back seat of the bus, and then took out my mobile phone ,searched the “Clap Song”. Listening to this beautiful song again.