wǔjīng
the Five Classics of Confucianism, namely: the Book of Songs 詩經|诗经[Shījīng], the Book of History 書經|书经[Shūjīng], the Classic of Rites 禮記|礼记[Lǐjì], the Book of Changes 易經|易经[Yìjīng], and the Spring and Autumn Annals 春秋[Chūnqiū]
HSK level 2
42929th most common word in books