Become a Boss from Seclusion

In the last years of Datang, heroes competed with each other, and Datang was divided into seven kingdoms. Liu Xuan, who traveled through time, had no choice but to lead his tribe into the mountains and forests to live a secluded life. Farming in the first year of seclusion Farming in the second year of seclusion Farming in the third year of seclusion Blacksmithing in the fourth year of seclusion Blacksmithing in the fifth year of seclusion Blacksmithing in the sixth year of seclusion ... Seclusion for twenty years and blacksmithing Living in seclusion for twenty-one years and building a steam engine What are you doing after living in seclusion for twenty-two years? Let's build an atomic bomb. Living in seclusion for twenty-three years, huh? How did I become emperor? . Travel through ancient times to see how the protagonist leads his people to create a steam civilization. (Survival, farming, behind the scenes, cultivation, collection, harem.)