Reborn in Another World: I Built the Greatest Gang Under Heaven

A young man from Earth transmigrates to another world and becomes the young leader of the Tianyang Gang, a small gang in the border county of Tianyang. His father has just died, and the gang is beset by internal and external threats. The protagonist puts down threats from within and repels powerful enemies from without, leading the Tianyang Gang from a minor border outfit to become the greatest gang under heaven.