靖康之变
The "Shizi" text was largely lost sometime between the writing of the 1060 "New Tang History" and 1345 "History of Song". The (1739) Ming and (1927) Qing dynasty imperial catalogs do not list the "Shizi". One private catalog, Chen Kui's (1174) "Zhongxing Guange shumu" lists the text with only one section written on two bundles of bamboo strips ("pian" ). Examining Chinese history between 1060 and 1174 when all full copies of the "Shizi" text were lost, Fischer suggests the Jingkang Incident when the invading Jurchen soldiers of the Jin Dynasty besieged and sacked Kaifeng, the Northern Song dynasty capital.