A thousand-year dream, returning to Bianliang, the capital of the Northern Song Dynasty. Chen Yuan, a history enthusiast, suddenly woke up after a hangover and found that he was a poor scholar on the streets of Tokyo who had just failed the exam. Here there is the prosperity of "the green mountains outside the mountains and the buildings outside the mountains", but also the confusion of "the warm wind makes tourists drunk". Facing this era that is both familiar and unfamiliar, should we just go with the flow and become a speck of dust in the long river of history?