《北史·本记·卷一》
五月初三，道武帝认为中山城里人都是被慕容普邻所胁迫的，便对他们进行招降和劝告。
五月庚子，帝以中山城内为普邻所胁，乃招喻之。
On the third day of the fifth lunar month, Emperor Daowu believed that the people in Zhongshan were forced to join Murong Pu Lin, so he sent people to persuade them to surrender.