From the fires and courtyards of Northeastern factories, to the dining tables in difficult times, the classrooms in turbulent years, the threshold after the resumption of the college entrance examination, the tickets of southern manufacturing, the iron gates of old factories after transformation, the lights of cross-city families, and then to the still empty page of the name book in the digital archives - "Provisional Title: Backbone of Mountains and Rivers" spans 1949 to 2025, based on the labor, love, parting, care, migration and choices of several generations of ordinary people, writing an epic of a republic that does not rewrite history with heroes.