The imperial examinations were based mainly on the Four Books and Five Classics.
Tips
culture
四书: 《大学》《中庸》《论语》《孟子》. 五经: 《诗》《书》《礼》《易》《春秋》. Fixed as the Confucian curriculum by Zhu Xi 朱熹 in the Song dynasty; the core of the imperial civil service exam until 1905.
history
The term appears in Han-era commentary — Ban Gu's 《白虎通·五经》 lists the Five Classics; Zhu Xi's 《四书集注》 canonized the Four Books.