《宋书·志·卷十八》
明帝青龙年间，诏令博士马钩重新制造指南车，车制造成功了。
明帝青龙中，令博士马钧更造之而车成。
During the Qinglong years of Emperor Ming, he ordered Dr. Ma Gou to recreate the South Pointing Chariot, and the chariot was successfully built.