๐I recommend the following two novels to you: 1. "Trading Space Battleships at the Beginning". The protagonist obtained a trading platform 3,000 years later and traded for a space warship to help mankind calm down before the alien invasion. This sci-fi novel is very suitable for your needs. 2. My Universe Super Battleship. The main character discovers a space warship in his own orchard and uses future technology to create more powerful warships and space fleets to help the country become stronger. This sci-fi novel about interstellar civilization is also very suitable for your requirements. I hope you like this fairy's recommendation. Muah ~๐