Earth's End-Of-The-World Special Forces System After a Thousand Years

Moving forward, a high school student has no intention of traveling through the earth 1,000 years in the future. This is a world where zombies, zombies, skeletons, and monsters are rampant. These monsters have a population of 50 billion and are still multiplying... Human beings are struggling underground. There are less than 10 million surviving humans in the world, 50% of them are in Asia, and the rest are widely scattered. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.