yéye / niánqīng / shí / jiù / kāishǐ / yánjiū / Yìxué / jiā / lǐ / yìzhí / bǎocún / zhe / tā / de / dúshū / bǐjì

爷爷年轻时就开始研究易学，家里一直保存着他的读书笔记。

Grandpa began studying the Book of Changes when he was young, and our family has kept his reading notes ever since.