Li Yun, a social beast, transformed into a scholar from a poor family in ancient times, with only a few walls. The tribesmen ridiculed him for being stupid for studying, and even the children in the village laughed at him for not being able to distinguish between grains and grains. Faced with the serious annexation of land, the entangled subordinate staff, and the impending famine, he reluctantly took out the "Barefoot Doctor's Manual", "Militia Military Training Guide" and "Local Governance in Counties, Townships and Towns". One year later, the whole county was rich and there were no stray items on the road; three years later, the new army he led flattened the barbarians; five years later, the emperor fell into deep self-doubt when he looked at the unprecedented abundance of the treasury and the "Memorial on the Preliminary Plan for Launching the Industrial Revolution" on the table.