After 2000 years of foundation building, the teacher said I was a waste?

Introduction: Ye Wu spent two days building a foundation and became a genius. After exiting the customs excitedly, he found that the sea had turned into a mulberry field. 2000 years had passed and the sect had long since ceased to exist. In order to survive, he had no choice but to walk out of the mountains, only to find that the world was too scary. There were terrifying bosses flying across the sky on "airplanes", and there were powerful cultivators sitting behind the "mobile phones". Ye Wu was trembling and shocked. Ye Wu, who does not know that he is the last cultivator on earth and has long been invincible in the world, has no choice but to keep a low profile and study in college in order to survive in this troubled world, pretending to be the cute freshman young lady...