In his own country, in his own city, and with his own forces at hand, Li Yifei was not one to remain passive. Since someone planned to make a move against Su Mengxin, he was set on rooting out these threats. A thief may go undetected for a thousand days, but guarding against one for that long proves much harder. Just one oversight could lead to irreparable consequences.
Although Brother Hu's men weren't exactly top-notch, they were the local snakes with the home-ground advantage. For them, finding people was easier, not to mention Li Yifei's mercenaries, who were experts in this field. Compared to the regular police force, they were much stronger. Just like what happened during Heizi's incident, it took them merely a day to effortlessly gather a pile of evidence against Heizi, evidence that the police would struggle to collect even in several years.