《宋史·志·卷一》
其一，过去的说法认为现在我国的中原是处在大地的东南区域，应当朝着西北方向观望极星，安置天极不应对着正北中心的方位。
其一，旧说以谓今中国于地为东南，当令西北望极星，置天极不当中北。
First of all, the previous sayings say that the central plains of our present-day China are in the southeast of the great earth, and we should look towards the northwest to observe Polaris, and that the celestial pole should not be facing the due north direction.