Doomsday City: Pick up the Invincible Armor at the Beginning

Why do humans become the masters of nature? There are many answers. Human beings are intelligent and can make and use tools... So there are so many branches of human beings, why is it that only our branch survives and reproduces? What are the characteristics that enable our species to dominate the natural world? What will happen when we lose this characteristic? A person from another world, wearing armor of unknown origin, and a heart unwilling to surrender... Zhang Hanjun, like his ancestors thousands of years ago, walked out of the wilderness and came to this last city of mankind. ———————————— Tell me why the cover and the title of the book are different. I changed the title of the book for fun. I heard that if I changed the title to follow the trend, it would get more traffic. But I found that I couldn't change it back, and I became a clown.