I Was Caught Working Part-Time After the College Entrance Examination, and Your Paint Will Still Be Invisible

[No system + brainless cool article + global live broadcast + patriotism] Gu Tian accidentally traveled through time and became a senior high school graduate, and was forced to take over his family's factory. The moment he finished his college entrance examination and rushed out of the examination room. But he never imagined that he would be surrounded by a group of SWAT police with real guns and ammunition! "This paint of yours can protect against radar?" "I don't know if it can protect against radar... I only know that it can protect against speedometers!" "..." "Your new drone has a battery life of up to 48 hours and a flight range of up to 10,000 kilometers?" "Well, that thing is just for express delivery. After all, the shipping fee is a bit expensive." "..." "Wait a minute, what the hell is this T40 fishing rod of yours?" "T40? You're talking about the T50, right? It can defend against air forces and catch fish fiercely." "..." In an instant, the entire network exploded with barrages! When troops in military uniforms appeared at his factory, Gu Tian was still confused. No, it's not... Why am I selling paint as a strategic material? !