File No. 7

Why is Helan Mountain, praised as the "Garden of the Western Frontier," also called the "Ghost Mountain"? Does the mysterious tunnel beneath it really lead to another world?

During World War II, the Japanese army never set foot in the northwestern frontier, so why was a huge Japanese base discovered beneath Helan Mountain? What on earth was the impossible arsenal there meant to fight against?

How did Genghis Khan really die, and where is his tomb? After destroying the Western Xia, why did he slaughter the entire city and search every inch of the ground? What was he looking for?

What caused the dead to "come back to life" and repeat the actions they performed while alive?

Does the mysterious black box really contain the genetic code of the Western Xia people?

Where is the treasure that the last Western Xia king moved before the fall of the nation?

Why did Zheng He suddenly turn back from the Red Sea on his voyages to the Western Ocean? Does a city of the future really lie beneath the Mediterranean Sea?

Why does an ordinary-looking chip hide a secret that drives scientists all over the world insane?