《宋史·列传·卷八十七》
蔡挺到任后，饬令所属各县建立严格的保伍制度。蔡挺抓获了几名寄居当地的盗贼，不再追究他们过去的罪行，然后将他们补为属吏，让他们也来参加纠察盗贼，一有情况即赶紧汇报。
申饬属县严保伍，得居停奸盗者数人，弛其宿负，补为吏，使之察警，盗每发辄得。
Cai Ting instructed the counties under his jurisdiction to establish a strict Bao Wu system after taking office. Cai Ting arrested several thieves who were living in the area, and instead of punishing them for their past crimes, he made them minor officials and had them help with the policing of thieves, and report any situation immediately.