Hand over the Portal and the Country Bulldozes the Other World

Lu Yuan accidentally obtained a two-way travel door. On the opposite side was a medieval alien world full of dragons, magic and power. He was so arrogant when he just got the adventure that he tried to use modern gadgets to become a rich man in another world. Until that day, he witnessed with his own eyes the cruelty of the alien knights who regarded human life as nothing. In the face of absolute extraordinary power, the cleverness of modern people can be defeated at a glance. Lu Yuan, who almost died, completely saw the reality. After returning to modern times, he made a decisive decision - hand over the time-travel gate to the country! Going to another world to be Long Aotian alone is asking for death. But what if there is a Blue Star country with modern large-scale industry, a torrent of steel, and saturation bombing standing behind it? "Times have changed, knights. Next, my motherland will take over here!"