Repaying a grievance with a straight line
The synonym "complaint by direct" generally refers to "complaint by direct". As a Chinese idiom, Pinyin is y à zh í B à oyu à n, which means to treat the person who resents fairly. It comes from the Analects of Confucius.
The origin of Idioms
In the Analects of Confucius, Xian Wen: "to repay resentment with uprightness, to repay virtue with virtue."
Idiom usage
It refers to the attitude towards people. example it's called repaying one's grievance with one's uprightness and repaying one's virtue with one's virtue. Feng Menglong's a warning to the world in Ming Dynasty (Volume 11)
Chinese PinYin : yǐ zhí bào yuàn
justice in return for injustice
the swift-footed get the most. jí zǒu xiān dé
be adjustable to circumstances. suí gāo jiù dī