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Chemical infrastructure: from useless lecturer to alien creator Cheng Cheng, a high school chemistry teacher, exploded through a dimensional wall in a hydrogen explosion experiment and traveled through time to become a useless handyman of the Qingyun Sect in the world of immortality. He had no spiritual roots and was bullied. When he was about to die, he was bound to the anti-routine "Scientific Infrastructure System". Others rely on spiritual energy to defeat monsters and upgrade during time travel, while he relies on chemical knowledge to accumulate experience points: Use a distillation device to solve the poisonous water purification crisis and make the monks kneel down to wait for pure water; Improving spiritual fields with chemical fertilizers, doubling the yield of elixirs, and slapping the old guard in the face; Use metallurgical principles to create alloy weapons and harden Xuanmen spiritual weapons; Use biogas to generate electricity, pave roads with cement, and build industrialized infrastructure in the world of immortality! System: "Host, the more outsiders rely on scientific creations, the faster their experience points will increase!" Lin Yan: "Understood, first build a water purification plant, then a steel-making plant, and finally the entire cross-world communicator - by the way, let these guys who believe in metaphysics see what 'knowledge changes the world'!" Conservative monk: "Heretical magic! Defiling the foundation of spiritual energy!" Lin Yan took out the pH test paper: "Here, test the pH of your spiritual fire, and then talk to me about the redox reaction of alchemy?" Former enemy: "I don't believe this piece of shit like you can win a spell!" When he turned around, Lin Yan used chemical traps and engineering defenses to pin him down and rub him on the ground. Finally, he cried and joined the Infrastructure Alliance. From a pot of distilled water to a cross-racial scientific community, from a useless handyman to the creator of another world, Lin Yan used high school chemistry textbooks to blaze a unique path of infrastructure construction in the world of immortality. "In the face of absolute science, any metaphysics must stand aside!"