Perfect World: Dreaming Back to Immortality

When Wang Heng woke up, he dreamed of perfect immortality.
He opened his eyes and looked at the world, including monks, sacrifices to spirits, monsters, ancient countries, great roads, true immortals, immortality medicine, Tao seeds, world trees...
Everything is so strange and yet so familiar.
In the middle of the Immortal Era, what kind of splendid era is this?
The true immortal appears in the mortal world, and even the immortal king can see it!