Half Heaven and Half Earth

The master is in heaven, the apprentice is in the world, and the master and apprentice work together to protect the world. Who has written history in the past ten thousand years? The earth has a history of 4.6 Billion years, and it is more than just these 10,000 years of history... There is heaven above the human world, and there were many waves of earth overlords from other races in prehistoric history... They will slowly appear in the book along with the story line of the thousand-year-old Han master and apprentice. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.