When he opened his eyes, he was transported back to the time of Zhenguan, a refugee who almost starved to death on the road to escape. It doesn't matter, we have it in hand - a modern library hidden in our mind. While others were fleeing for food, I cultivated seeds, improved farm tools, and picked up a down-and-out scholar to work as a bookkeeper. But the scholar looked at me with more and more strange eyes: "Girl, your method is more than enough to get the first prize in the examination." I smiled modestly: "Low-key, first let me double the grain yield per mu, and then write down 300 sets of imperial examination questions." Later, I stood in the Jinluan Hall, looking at the civil and military disciples of the entire dynasty, and silently asked the system: How much inventory does this library have?