Once this secret is revealed, the whole world will fall into panic and chaos. This is definitely not alarmist talk. Maybe you will think that sinkholes, Bermuda, Loch Ness, crop circles, ghost ships... these are all people. A terrifying and unsolvable secret, but in front of this secret, everything seems so small and insignificant. If no one reminds you, you will never be able to imagine what is hidden behind this secret. On this earth we live in, Modern human civilization is not unique. In the long history, there have been at least five mysterious annihilations of civilizations. Why did they disappear? Qin Shihuang built the Great Wall with the power of a country, and what was it for? To resist alien invasion? Things are not what you imagined It's that simple. All of this is attributed to a mysterious file, the code name of this file is called Tianji ------------------------ ---Long Fei is grinding iron's fourth book, please rest assured to collect it. During the new book period, we need everyone's full support, please vote for Long Fei, thank you.