Lost Medal

Alien invasion, fortunately, I have an alien sister who is super powerful, so powerful that other aliens cannot defeat her. I use the alien invasion method to write a science fiction novel about mechas, trying to be as close to reality as possible. Except for alien invasion, other things may basically come true in a few years. Of course, some things are fictional, but they are generally in the scientific category. I don't want to be too outrageous. I hope everyone likes it. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.