Arrested From the Start, They Ask If I Can Build an Electromagnetic Cannon

Yun Chen transmigrated to a parallel world and became a student at the University of Information Science and Technology. The first thing he did after transmigrating was happily wash up! Just as Yun Chen was enjoying his shower, a group of armed paramilitary police stormed into the room. “We suspect you of arms trafficking. Come with us!” In the interrogation room, Yun Chen sat there, completely bewildered. “Is selling farm machinery really a crime?” The police officer said, “Farm machinery?” “Do you know that people in the Middle East use the gas cylinders you sell as mortars?” “Do you know that people are using the rifled steel pipes you sell to make rocket launchers?” “Do you know that people are using the artificial rain shells you improved as intercontinental missiles?” “Do you know that people removed the tracks from the tractors you improved and fitted them to tanks?” “Do you know that the drones you improved can reach Mach 1?” “So what exactly is this, a drone or a fighter jet?” “And now you're telling me you sell farm machinery?” “One last question: can you modify a railgun?” Yun Chen said, “Sure, but you provide the materials, and the price is negotiable!” A month later. “I asked you to build a prototype. What is this thing you made?” “It has a range of 300 kilometers, and you call it a prototype?”