the program takes the "forbidden city" as its eye and takes "change" as its entry point. it uses 12 chapters of "king", "basic prosperity", "fall road", "shock change", "escape", "spying imagination", "full era", "through the world", "thinking danger", "pictures", "break dawn", and "new life". from the perspective of big history, it selects several "change" events in china's nearly 600-year history, interprets gains and losses from the turning point of history, draws chinese wisdom from the thousand-year chinese culture, and uses a deep and contemplative gaze to understand the world through the forbidden city, and also allows the world to understand it from the condensed 600 years of forbidden city. aaa。 at the same time, the program creatively tailored 12 musical theme songs for the 12 episodes of the program, inviting singers of different qualities to perform diversified interpretations, placing the long and profoundness of historical and cultural between notes and melodies, and realizing innovative expression of traditional culture.