Prehistoric Calendar

That was a story that happened a long, long time ago... It was an era when human beings were drowning in boundless blood, with the sky and the earth unable to respond, the earth and the earth unable to function, unable to survive, unable to seek death... That day, a baby named Gu was born to a tribe named Pan... That day, a baby named Jun was born to a tribe named Hong... That day, in a tribe named Li, three brothers were struggling to survive... That day, a tribe named Ye was born... That was a story that happened a long, long time ago... That is the story of mankind's endless struggle and countless sacrifices, and finally created the world. That is... Prehistoric calendar!