| 1 | This was later known as the famous Battle of Guandu, in which Cao Cao defeated the Yuan army when the Yuan army outnumbered his greatly. | |
| 2 | Guandu plan for the Battle of Cao Cao (147-223), the word text and, Wuwei, and policy makers are famous Three Kingdoms period. | |
| 3 | Cao Cao s system of opening up wasteland and growing food grain settled the problem of grain supply and guaranteed the rear supply in the War in Guandu. |