The protagonist, Aji, is the son of Qin Zishan and Guo Ying Ruihong. Qin Zishan's story can be found in my work Treasure-Gathering Ascension. Guo Ying Ruihong drove Qin Zishan away, then raised Aji in isolation deep beneath a different world, cut off from the rest of the world. Aji had never seen his father and barely spoke with his mother. He cultivated alone for several thousand years before finally meeting another person, and his cultivation was unfathomably deep. Yet his mind was like that of a ten-year-old child. Due to deliberate scheming and an accident, mother and son were separated. Aji set out on the path to be reborn and did his best to find his father, Qin Zishan. More than anything, he wanted to return to the vast inner world within his father's body.