Gingival care
Chinese idiom, Pinyin is y í NY í NJ à Ji à o, which means to care too much about unimportant things. It's the same as "haggling". From "Sino Japanese negotiation review · new requirements for solving outstanding cases".
The origin of Idioms
Liang Qichao's comments on Sino Japanese negotiation · new requirements for solving outstanding cases: "with the friendship between our two countries, we don't have to worry about our feelings."
Idiom usage
Used as a predicate or adverbial; used in writing.
Gingival care
act from inside in coordination with attack from outside - wài hé lǐ yìng
repair the old and utilize the waste - xiū jiù lì fèi
answer as quickly as the flowing of water - yìng dá rú liú
man of great courage looks like a coward - dà yǒng ruò qiè