Heart and blood
Chinese idiom, Pinyin L ò UX ī n ǒ uxu è, means to describe painstaking design. It's from Sheng'an poetry talks - fake poetry.
The origin of Idioms
Yang Shen of the Ming Dynasty wrote in Sheng'an Shihua, a false poem: "such a Hun generation, all empty chant, life painstaking, but five or seven words short law."
Idiom usage
As a predicate; used in composition, etc
Heart and blood
the foot does not dip in the ground - jiǎo bù zhān dì
Put aside one's sleeves to save money - bài xiù què jīn