Started from Haolao Street in Longmen, Chongqing. Liang Yifan brought the "Courage" cassette tape that had not been sent out twenty years ago, witnessed his first love having a family, and then turned around and left, joining Echo Bookstore from then on. Xia, delivering letters for young people who dare not go home, watching his mother wait for years for letters to be returned; Autumn, on behalf of the foreman, returned the iron frog and saw two middle-aged men guarding their thirty year friendship in front of a bulldozer; Sending the military coat back to the Tulou in southern Fujian, the son of the benefactor went from resisting to taking over what his father had done. Four old items, let go four times. What is given is something, but what is untied is the knot in people's hearts.
