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The national archaeological team inspecting Shennongjia discovered traces of alien civilization in a certain ruins. At the same time, the human lunar landing craft also landed smoothly on the moon. But when the astronaut just stepped on the lunar soil, he saw the footprints of other creatures next to his footprints, which made him retract his falling feet... The discovery of two new civilizations caused a sensation around the world, and the exploration of the two places continued... As the exploration continued to deepen, mankind seemed to have seen its own origin...