Watching Videos in the Sui Dynasty

Jian Qu, a 28-year-old corporate wage slave at a major tech company, dies suddenly and transmigrates into the body of a fifteen-year-old refugee digging a canal in the ninth year of the Daye era. Every day, he gets a bowl of watery porridge mixed with sand, and if he can't keep working, he's whipped. Just when he thinks he won't last three days, he binds to the [Cross-Time Dimensional Downgrade System]. He expects to pull out a Gatling gun and mow down his enemies, but then he checks his permissions: "Bilibili searches limited to once per day, with a maximum viewing time of 30 seconds." "Kuaishou's recommended feed is all seaside foraging, suona music, and corny pickup lines." After using a 30-second clip of Krav Maga combat training to kill a Sui army commandant, Jian Qu finally gets it. No modern firearms? No elixirs of immortality? No problem. With just over thirty refugees at his side, he uses modern management principles and a log of trial and error to get down to some serious farming. He boils salt, forges iron, improves the curved-shaft plow, builds military crossbows... Then one day, he opens the System Shop and sees a line of small, dark-gold text: [EUV Extreme Ultraviolet Lithography Machine: Complete Design Plans and Industrial System Simulation]. Jian Qu looks at the refugees still digging mud with wooden shovels and falls into deep thought. In an era when they can't even forge iron properly, is it he who's gone mad for trying to build a lithography machine by hand, or is it the world?