The Civilian Mechanic: From Gas Tank Mortars to Crafting a Sixth-Gen Stealth Fighter!

Transmigrating to a parallel world, Lu Feng became a student at Southwest University of Science and Technology. Besides studying diligently, he worked part-time at his uncle's farm machinery factory during every holiday. One day, while he was in class, a group of fully armed police officers suddenly stormed into the classroom. "Lu Feng, right? Come with us!" In the interrogation room, the police officers and experts looked at the documents in their hands, their faces grave. "While everyone else is enjoying their holiday, what are you doing?" Lu Feng honestly replied, "Working at my uncle's farm machinery factory." "What are your specific job duties?" "Providing after-sales and some value-added services to clients, including modifying gas cylinders into mortars and hands-on lathe operation, methods for improving the precision of rocket launchers by cutting steel pipes, and solutions for modifying tractors into universal tracked tanks..." "And what about intercontinental ballistic missiles?" "Modified artificial rain bombs." "Do you know that your actions have violated the law?" "During the summer vacation, I took some time to study for my lawyer's license, focusing on international law, war law, espionage law, smuggling law, and arms trafficking law... May I ask, which specific law did I violate?" Police: "..." Expert: "One last question, can retired J-10 fighter jets be modified?" Lu Feng: "Yes, sixth-generation aerospace engines, very expensive, want to place an order?" Lu Feng honestly answered the questions, only to find that everyone in the room seemed bewildered.