Invincible from Age 69

Respecting the elderly and caring for the young is a virtue. What if the old man standing before you is an invincible powerhouse? Cang Fenghua transmigrates to a world of superpowered people. After founding the Taiji Sect, he chooses to live in seclusion. He has a Disciple System: the more disciples and descendants he has, the greater the rewards he receives from the System. After ten years in seclusion, his disciples and descendants number 30 million, and his cultivation reaches the peak of the Martial Emperor realm. After twenty years in seclusion, their number surpasses 100 million, and he reaches the Martial Saint realm. After thirty years in seclusion, their number surpasses 500 million, and he stands just one step away from the Martial Immortal realm.