In the fourth year of Xuanhe (1 122), Song and Jin made a covenant, stipulating that after the demise of Liao Dynasty, there should be Yanshan Road and Yunzhongfu Road in Song Dynasty. The result was not decided later. After Yan was established in the Song Dynasty, the 16 road was established, namely, Liang Zhedong, Liang Zhexi, Jiangnan East, Jiangnan West, Huainan East, Huainan West, Jinghu South, Jinghu North, Jingxi South, Chengdufu, Tongchuan Fu, Kuizhou, Lizhou, Fujian, Guangnandong and Guangnanxi. The establishment of administrative divisions and local political systems in the Song Dynasty can be described as emphasizing the interior and neglecting the exterior, and the central government is highly centralized. Although it avoided the separatist situation in the buffer region, it led to the weakness of local defense and the continuation of foreign invasion in the Song Dynasty.
Nanjing (Jiankang) belongs to Huaihe East Road (Road is the administrative area of Song Dynasty, equivalent to today's province).