I Am the Demon Emperor Reborn

For five hundred years, I, Li Han, was a genius. For the sake of all living beings, I sealed the Heavenly Abyss and the Demon Abyss... Yet all living beings, my family, and my beloved betrayed me. But now that I, Li Han, have lived a second life, I will make every one of those who betrayed me pay. Li Han swears to take revenge.

As for what I sealed inside the Heavenly Abyss and the Demon Abyss...

Are they really demons? Why are those I sealed there people bearing the same sinful blood as me? And do the sects of the world truly stand for righteousness? Are the Buddhists truly Buddhas? What is the truth, the truth behind it all? What is righteousness? What is a Buddha? What is a demon? Is a Buddha really a Buddha, and is a demon really a demon?