It is common for graduates from the history department to be selected by a mysterious "history maintenance system" on an ordinary night of overtime work, and kicked into the troubled times of the late Ming Dynasty. The seventeenth year of Chongzhen begins with hellish difficulty, with only one month left before the city of Beijing is broken. The first task released by the system turned out to be just "survive". In order to survive, and for the slim hope of returning home, I have no choice but to use my little historical knowledge and modern thinking. In this era when human life is at stake, I unite all the forces that can be united to build my own paradise step by step, starting from a small village that is about to starve to death. From the late Ming Dynasty to the prosperous Tang Dynasty, from the troubled times to the ruling times, he was thrown into the torrent of history time and time again, sailing against the tide, using his own hands to fight for a chance of life for those innocent people who should have died in the disaster. This is the story of a small person struggling to survive in the cracks of history and finally trying to change history.