Humble as Human Beings

30 Degrees north latitude is synonymous with mystery. The four ancient civilizations are all concentrated near this mysterious 30 degrees north latitude. At 30 degrees north latitude, there are many wonderful natural landscapes, as well as many mysterious phenomena and unsolved mysteries, such as the mystery of the savages in Shennongjia, the Yangtze River's two interruptions, Mount Everest, the Dead Sea...