Borrow books to keep true
The Chinese idiom, Ji è sh ū Li ú zh ē n in pinyin, means to borrow someone else's book and leave the original copy after copying, and return it to others. It comes from the biography of Hanshu Hejian Xianwang.
The origin of Idioms
"Hanshu · Hejian Xianwang Zhuan" says, "if you get a good book from the people, you must write it well and keep it true."
Idiom usage
To act as a predicate or attributive
Borrow books to keep true
spread a net for sparrows and dig for rats - luó què jué shǔ