He Went to Cultivate Immortality Without Telling His Family, and He Came Back Invincible

(No rebirth + decisive killing + single female protagonist + no system + multiple planes) Seven years ago, Xu Yifei, who was supposed to be in college, was taken to Tianyuan Continent by an old man who claimed to be invincible in the world. After seven years of hard training, he reached the supreme Nascent Soul state. In the end, the old man fulfilled his wish to return to Earth and used his last strength to open the space barrier between the two worlds. After returning to Earth again, he didn't expect that his father had passed away and his grandfather was missing, leaving only his mother with a younger sister... This was the first time in seven years that he cried. In order to find his grandfather, he returned to Tianyuan Continent. But I learned that this world is far from as simple as I thought. All races stand in harmony, while the human race declines. Become the lord of all races and save this dark era. Master Ling Yun: "Yifei, will you hate me?" Xu Yifei: "Master, it was you who led me on this path. There is no turning back..."