Just in case
Repaying one's kindness is a Chinese idiom. Its pronunciation is B à oxi à ow à NY à. It means repaying one's kindness, which means giving only a small amount of reward. From a dream of Red Mansions by Cao Xueqin in Qing Dynasty.
interpretation
Reward: to serve in return for kindness.
source
Chapter 18 of a dream of Red Mansions written by Cao Xueqin in the Qing Dynasty: "today's great virtue of heaven and earth, and the great grace that has never existed in ancient times and today, can't be rewarded even though the heart and brain are ruined!"
Just in case
touch gold and turn it into iron -- miscorrect a piece of writing - diǎn jīn chéng tiě