Stocking up System in Lean Years Helps Me to Calm Down the Troubled Times

At the end of the Qian Dynasty, the land was thousands of miles away, the court was corrupt, the people were filled with resentment and starved to death, the people exchanged their sons for food, and the external vassals of various ethnic groups continued to harass the people. At this time, the protagonist traveled through the world with the system, saved the people, and exchanged materials with the system. After a series of events, he overthrew the old dynasty and led the people to live a stable life.