The reason was simple. The heavenly court had set the standard 20000 years after the eight desolations calendar. That was the time when the eight desolations universe would be promoted, the wind of the universe would blow, a large number of universes would be born, and the immortals would enter the eight desolation universe!
who would believe this if he wasn't deliberately targeting them?
therefore, the immortals in the universe made a fuss, but they only complained about the injustice on the skynet. no one would really take action, as it was a sin to take action in the eight desolate universe. this was a restriction to all immortals, with no exceptions.