Yesterday reappears is a sentimental work in pursuit of nostalgia, and it is the most classic English song in Europe and America in the last century. Lonely singers who have experienced a series of lovelorn blows are loyal listeners of radio stations and often sing along with love songs in radio waves. Later, when she fell in love, she had no leisure to listen to music broadcasts, and gradually alienated from the radio. Now, hurt by feelings and dying, she turns on the radio again, and the familiar melody rings again, one after another, as if telling her life story. Time goes by and feelings change, but those old songs that used to be like old friends are as loyal as ever and will never betray themselves. The warmth is mixed with pain, and the comfort is even more sad: Is man not as good as a song? Affectionate, fragile and sentimental, she wished that yesterday could be reproduced with the old songs and harvested at random.