Book of Song
Different than Lê Văn Hưu who saved his prior concern for the identity of the country from China, Ngô Sĩ Liên, according to O.W. Wolters, Ngô Sĩ Liên took the Chinese historiography as the standard in assessing historical events of the history of Vietnam. In commenting one event, the historian often cited a passage from Confucianist classics or other Chinese writings such as the "Book of Song" in order to rhetorically support his own statements.