The song "past" was originally intended for the birthday present of Gu yansheng, but it has now been uploaded on Weibo. The song's creator, Wen nian, is overjoyed to see his son shine. He says that he hopes that his son's life will be bright and full of light, but that he has to fight back if he is to survive the music business. He tells his uncle that some of his fans have reported him to the piano associations of the city hoping to expel him. He asks his uncle to help him, but he says that it is too late for him to write an apology letter. He begs his uncle for help, but his uncle will not listen to him. The uncle tells him that he will have to deal with it himself, and he leaves.