He only knew that his brother had died, was killed by someone, and the person who killed Shangguan Feng's brother must pay with their life.
So Shangguan Feng used the power of the Qingfeng Gang to track down that an assassin had taken the bounty on his brother Zhou Qing, and after a series of investigations, he finally locked onto Li Feiyu.
Shangguan Feng had already sent Liu Qing last year to bribe a constable from the Demon Slayer Bureau and constantly monitored the bureau's movements. Finally, the day before yesterday, he discovered Li Feiyu's whereabouts.
However, Liu Qing, who was skilled in stealth techniques, was instead discovered by Li Feiyu. Fortunately, Liu Qing was clever. He claimed that Shangguan Feng usually enjoyed associating with heroes and offered the Muscle Strengthening Formula as bait, finally luring in the one who killed his brother.
