Humanity was once the protagonist of heaven and earth, but after the Investiture of the Gods, there were no more Human Emperors or Human Kings, only Sons of Heaven.
What is a Human Emperor? The sovereign of humanity, the emperor of the mortal realm, equal in rank to the Celestial Emperor!
What is a Human King? One who commands humanity's fortune, rules the four seas and eight wilds, and stands as the supreme ruler of the mortal realm, with a rank no lower than the Celestial Emperor's!
What is a Son of Heaven? A child of Heaven!
A Son of Heaven?
What a joke. Among humanity, there can only be Human Emperors and Human Kings, never Sons of Heaven.
Ever since the Investiture of the Gods, Human Kings have been called Sons of Heaven. If that's how it is, then let the Investiture of the Gods be rewritten!