After the Jingkang Incident, the Northern Song Dynasty collapsed.
The Jin people supported the surrendered minister Liu Yu as the "Emperor of Da Qi" and asked him to rule Henan and Shandong on behalf of the Jin Dynasty. In everyone's eyes, he is just a puppet that can be discarded at any time.
But this time, Liu Yu had the judgment, patience and ability to employ people of the top founding emperors.
He was not eager to fight against gold, nor was he obsessed with false imperial titles. Instead, he turned a pseudo-dynasty into a real country bit by bit, starting from granaries, river workers, military salaries and officials.
The Jin Dynasty wanted to control him, the Southern Song Dynasty wanted to eliminate him, the scholars in the Central Plains regarded him as a traitor, and the legal system of Zhao and Song Dynasties was a shackle that he could not circumvent.
In order to win the hearts and minds of the world, he even took the initiative to take off his imperial title and support the Zhao clan. He used the regency and forbearance of a generation to buy time for the Liu clan.
This is the story of a man who was stigmatized as a traitor, and used two generations of governance, war, and intrigue to turn the throne lent to him by the Jin people into a real dynasty.
No time travel, no system.