After Practicing Taoism for Thousands of Years, Demons Revived at the Beginning

He Qingyun was reborn in a parallel world. This ancient world had Taoism, immortality, and demons that killed people. Rely on your own system to suppress one party, and then the demons dissipate, retreat to the Taoist temple, and hide in the world. Thousands of years later, when he walked out of the Taoist temple, the great development of human science and technology brought him back to the situation before his rebirth in an instant, and the demons seemed to no longer exist. But the method of cultivation has long been hidden in the world, and he is actually regarded as a great master. And with the sudden revival of spiritual energy, the demon also appeared. But when He Qingyun swept away the demons, he was regarded as the strongest human being. When several demon kings faced off against He Qingyun, they were killed with one sword. "You, aren't you just a great master!?" The demon kings yelled unwillingly. "Did I say that?" He Qingyun held the fairy sword and floated in the air.