金史
Despite both the "History of Song" and the "History of Jin" being completed at the same time they are different in many ways. the "History of Song" records Yue Fei emerging victorious from every battle with the Jin dynasty, yet the "History of Jin" barely mentions Emperor Taizu of Jin's capture of Bozhou, Shunchangfu (), Ruzhou and Songzhou () when Yue Fei and other commanders withdrew from the battle. Information in the "History of Song" regarding Yue Fei all comes from a work by his descendant Yue Ke's () "Eguo Jintuo Zuibian" (, literally: 'Record of the Jin in Hubei'), the reliability of which is questioned by some sources, for example whether the Battle of Yancheng () really was a great victory for the Song and if the claim regarding Yue Fei's twelve gold medals is true. Furthermore, there remains the issue of whether Yu Fei's troops left the people unharmed as is sometimes claimed. Qing dynasty poet and historian Zhao Yi () covers this in his Twenty-two Historical Sketches () under a section regarding observations on the Song and Jin armies ().