I Asked You to Teach Physics, and You Rubbed the Plasma Cannon with Your Hands?

I asked you to teach physics, and you rubbed the plasma cannon with your hands? A public live class. Lin Yi obtained the black technology system. A plasma cannon was pulled out on the spot. As the plasma cannon ignites and starts. There was a roar. The students were shocked. A professor in the audience was even more incredible. Just because Lin Yi wrote a series of equations on the blackboard that could usher in a new era for mankind. However this is just the beginning. Lin Yi's various black technologies emerged one after another. Bolter, power armor, Viking fighter, siege tank, Gloria armed robot, Thor armor, Dreadnought armor, battlecruiser... When the battlecruiser jumped over the beautiful country, Yingjiang was completely panicked! "When did Long Guo master this technology? Is it too late for us to kneel now?"