《宋书·志·卷十八》
宋顺帝升明末年，齐王担任宰相，命令祖冲之制造指南车。
宋顺帝升明末，齐王为相，命造之焉。
In the later period of Emperor Shun's reign in Song, Qi Wang, who was then the Prime Minister, ordered Zu Chongzhi to make a指南车 (south-pointing chariot).