Pei Ju
At that time, after the great disturbance at the end of Sui, much of old book collections had been lost. Linghu advocated, and Emperor Gaozu agreed, to seek out books and purchase them and, once they were bought, to have them copied as well. After several years, the imperial collections were more comprehensive. Linghu also pointed out that while the Southern Dynasties' histories were largely written, little have been formally compiled of Northern Zhou and Sui Dynasty's histories—and that the deeds of the great people of those two dynasties, including those of Emperor Gaozu's ancestors, would be lost. Emperor Gaozu therefore issued an edict commissioning Xiao Yu, Wang Jingye (), and Yin Wenli () to compile the history of Northern Wei; Chen, Linghu, and Yu Jian () to compile the history of Northern Zhou; Feng Deyi and Yan Shigu to compile the history of Sui; Cui Shanwei (), Kong Shao'an (), and Xiao Deyan () to compile the history of Liang Dynasty; Pei Ju, Zu Xiaosun (), and Wei Zheng to compile the history of Southern Qi; and Dou Jin (), Ouyang Xun, and Yao Silian to compile the history of Chen Dynasty. However, after the issuance of Emperor Gaozu's edict, not much actual historical compilation was carried out, and the projects stalled.