shǒu​bù​shì​juàn

diligent in one's studies

Senses

手不释卷/ 手不釋卷 shǒu​bù​shì​juàn (also shǒu​bú​shì​juàn) diligent in one's studies

literally meaning "always with a book in hand"; used to describe someone who is extremely studious or so engrossed in reading that they cannot put their book down

References

variant 手不释卷/手不釋卷 手不辍卷/手不輟卷