Li: Didi. Metaphor paid all the energy, exhausted the energy of a lifetime. It is usually described as a dedication to career, work and literary and artistic creation.

The idiom comes from the biography of Li Changji by Li Shangyin in the Tang Dynasty: "If you want to express your heart, you will do it for yourself." Tang Hanyu's poem "Returning to Pengcheng" said: "Take the liver as paper and write with blood."

Make great efforts to act as predicate, attribute and adverbial in sentences; With praise.

The teacher made every effort for our study.

Exhauste sb.' s efforts

Describe thinking hard and taking pains; Can be used as predicate, attribute and adverbial in a sentence; Often used to express the hardships of work and literary creation; With praise.

"Biography of Li He" by Tang Li Shangyin: "(Li He) has been a slave since childhood, riding a long distance (xū), memorizing ancient tricks, and putting books into the bag when something happens." When I got home at dusk, Mrs. Tai took the maid out of her bag and saw many books. Mo Dao:' Yes, you have to express your heart.' Later, people extracted the word "bitter songs" from this sentence, and put forward the word "bitter songs" from Han Yu's poem "Returning to Pengcheng", which formed the idiom "bitter songs".

Baidu encyclopedia-drain your efforts.