Human beings' response to sound is extremely subtle. They can neither tolerate noise nor loneliness. However, the movements formed by the ever-changing combinations and arrangements of seven notes, as well as the songs played by human vocal cords and various musical instruments, all constitute a treasure trove of music that is pleasing to the ear and the heart. Whether in families or factories, in the sky or on the ocean, music has become a spiritual enjoyment for men, women, old and young. It can make people vent their feelings, be excited, forget their worries, and work hard. Its rhythm can relax heavy steps; its melody can make people forget sadness and fatigue. According to scientists' research results, music is not only so friendly to humans, but can also speed up the growth of plants and increase milk production in dairy cows. But ultimately, music is what humans create for themselves. Its charm lies in refreshing the heart and reshaping people's emotions and life.