My Ex-Girlfriend Sold Junk and Exposed My Identity as a Technology Guru.

Lu Chen traveled to a parallel world where ferocious beasts existed. There are no awesome skills rewarded by the system, only his super brain. So he began to quietly invent various weapons... After breaking up with his girlfriend, the other party bought her "broken copper*iron" Just... : Damn it, this is the Hummingbird prototype, the first generation of that unmanned reconnaissance aircraft! : This exoskeleton is not only as light as a feather, but it also has such a great auxiliary effect! : Light sabers really do exist in the world, but they are too powerful! : This is... The Ark Reactor? That thing on Iron Man's chest! : No, these are unwanted waste products? You are lying to children! … The whole network was shocked for a while. My ex-girlfriend was confused too! Isn't Lu Chen a pretty boy who has nothing to gain and achieves nothing? So what's going on with all this stuff? This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.