The Setting Sun Still Has Its Rays of Light

It's a sci-fi apocalypse, with a grown-up male protagonist, a single female protagonist, and no harem. There is a team, but there is no Holy Mother. Try to keep everyone's IQ online. (After all, your IQ is limited) Ye Yichen has a local name, and he looks serious, but in fact he is a talkative person who occasionally goes crazy. In this world, alien civilization invades, mythical beasts appear on the blue star, people flee for life and death, and the end of the world officially begins. When the building is about to collapse, there is always a group of people who stand up. They promptly appeased the people, built underground cities, and organized soldiers to fight back. Under this stimulation, human science and technology began to advance crazily, and weak countries were destroyed one after another, leaving each country unable to take care of itself. Humanity has been exploring for more than sixty years and has built mechas, new energy sources, fighter planes, and spaceships. Resist. What's the next story like? Who wins and who loses is never known. So stay tuned.