Lin Yiyuan knelt in the stagnant water of the Gannan mine. He smashed the iron pickaxe for three days and three nights, and the broken ore cut open the back of his hand. The miner next to him coughed up black blood and fell down - the Mongolian shaman's spell seeped through the dragon's veins, and the plague engulfed the work shed like wildfire. His fingers touched a cold stone slab, and Persian words appeared before his eyes: Dynasty Upgrade System Binding, the first lesson, please teach three miners to write their names. He used charcoal to draw letters on the rock wall. The miners gathered around and started learning from the crooked character "". Three months later, the first school was built in this mine; half a year later, eight hundred mine slaves were able to recite the Sutra; a year later, the node of the Dragon Vein in southern Gansu was rekindled with golden light. When Kublai Khan's scouts came here, the shaman master sneered: "How can a bunch of mud-legged people reading books stop the Mongolian cavalry?" But when his cavalry rushed into the mining area, they encountered a sea of red - every miner's fingertips were wrapped with the energy of dragon veins, and every Chinese character they wrote turned into a shield. Lin Yiyuan stood on the roof of the school and wrote the last sentence: "From today on, everyone on this land can let the grassland learn to bow its head."