| 1 | Sword belongs to dual blade short arts, which firstly emerged before Yinshang. | |
| 2 | The discovery occurred in anyang, Henan Province, which was the capital city of the Shang Dynasty. | |
| 3 | The perjury has been recorded since Yin and Shang Dynasty. | |
| 4 | The huge bronzes showed little influence of the bronze culture of the Shang culture in Henan Province. | |
| 5 | Song state, as an offspring of Shang Dynasty, is a more special state in Spring and Autumn Period. |
