From the Start, I Passed the Imperial Exams at the Top, but My Father Wants to Purge the Family

Some people top the imperial examinations to bring honor to their families. I spent ten years studying to clean up my entire gang and bring it into the light! Born in darkness, yearning for the light? No. I'm the one and only rule governing the line between black and white! You want to play at the refined gentleman? I'll play gang warfare with you. While everyone else talks about the rules of the underworld, I use the power of the authorities to eliminate my rivals.