My System of Cultivating Immortals Forces Me to Save the World

Heixie invaded, and the first era was shattered. In the second era, Lin Kong relied on Lin Kong alone to arbitrarily stop the invasion of Heixie, but he could not completely defeat Heixie, and Heixie became more and more powerful; "The only way to defeat Heixie is to defeat Heixie in the past, present, and future at the same time." Lin Kong could only place his hope in his symbiotic artifact "Tao Ji". "Go to Earth, find a chosen person, and let him defeat Black Evil in the third era." Therefore, Earthling Han Qing was inexplicably summoned to Feixian Continent to practice; While others' goal is to become an immortal, his goal is only to save the world.