I'm a demon cultivator

Tan Shuchang thought that he was born in a scholarly family, and that he was a successful candidate in the imperial examination at a young age. He was a blood-sucking worm. He should have held local power, received endless gifts, spent endless money, celebrated endless New Years, and taken endless concubines. How could he have fallen to the point of becoming a demon cultivator? After thinking for a long time, he still couldn't figure it out. He crawled out of the blood pool and decided to think slowly...