诗书发冢 is an idiom

诗书发冢shī shū fà zhǒng

比喻口是心非、言行不一的伪君子作风。

Origin 《庄子·外物》：“儒以诗礼发冢。”

Word breakdown for “诗书发冢”: Open in Reader →

the Book of Songs 诗经[shī jīng] and the Book of History 书经[shū jīng]

发發HSK 2

1.to send out2.to show (one's feeling)3.to issue4.to develop+2 more +3 more

1.hair2.Taiwan pr. [fǎ]

1.mound2.burial mound3.senior (i.e. eldest child or senior in rank)

burial mound (variant of 冢[zhǒng])