The Sect Rejected Me, So I'll Build an Even Stronger One

After the protagonist is driven out, he finds a book titled A Guide to Running a Sect. While others cultivate immortality through talent, he does it through "going public and raising capital," taking in good-for-nothings from all walks of life and launching an "MBA program for cultivators." Ten years later, his old sect comes to challenge him, only to discover that his sect has monopolized the entire eastern region's elixir market.