There were historical traditions and sophisticated use of historical method in ancient and medieval China. The groundwork for professional historiography in East Asia was established by the Han Dynasty court historian known as Sima Qian (145–90 BC), author of the Shiji (Records of the Grand Historian). For the quality of his written work, Sima Qian is posthumously known as the Father of Chinese Historiography. Chinese historians of subsequent dynastic periods in China used his Shiji as the official format for historical texts, as well as for biographical literature.