They are mostly reformed gang members on probation, or residents eager to contribute to the public interest. When patrolling his beat, Chi frequently patronizes their shops, or volunteers his assistance. After establishing a relationship, he asks that they report to him anytime there are any suspicious figures frequenting the area or any unexpected incidents.
紀澤民有 8 個「細胞」遍佈在市場或路邊商店，他們多半是從良的列管兄弟，或是熱心公益的居民，紀澤民是在勤區巡察時，因為經常光顧他們的店，或主動提供協助，套好交情後，再請他們針對附近出入的可疑份子或突發事件隨時通報。