Zhenguan Infrastructure: Check in to Draw Out Modern Technology

"Ding--I signed in at the West Market Rice Shop today and got the "Blast Furnace Ironmaking Technique"!" Li Yan, a poor scholar, wiped the batter on his face (he had just copied the rice merchant's account book in exchange for it), stared at the system panel, and laughed out loud. This is the ninth year of Wude. Li Jiancheng and Li Shimin fought hard, but the people in Guanzhong were chewing Guanyin soil - but no one knew that this poor man who always squatted at the city gate and copied books had a gift package of modern technology in his arms: the cement formula could build a ten-mile long street, the rice seeds in the city could save millions of hungry people, and even the "Caravan Operation Guide" could sell silk from Chang'an to Persia! When he slapped the prescription for vaccinia on Li Shimin's desk, the calculation in King Qin's eyes turned into a burning passion: "What do you want, sir? An official position? Wealth?" Li Yan touched the newly drawn "Hundred Policies for County Government" in the system and smiled slyly: "Your Highness must believe me - use these 'wonderful techniques' to change the prosperous Tang Dynasty into another one."