ㄎㄞkāiㄐㄩㄢˋjuànㄧㄡˇyǒuˋ

  1. 打開書本閱讀好處·澠水··》:太宗御覽暇日追補開卷有益不以為。』」開卷有得」。

lit. opening a book is profitable (idiom)​; the benefits of education
Lesen bringt Nutzen (Sprichw)​