a deed as tiny as hair
Si FA Zhi Gong, a Chinese idiom, Pinyin is s ī f à zh ī g ō ng, which means minor credit. It comes from the ten annals of Shang Han Dynasty by Cai Yong of Han Dynasty.
The origin of Idioms
Cai Bozhe's ten annals of the upper Han Dynasty: "father and son are both favored, so they can't lose heart and make contributions to the silk."
Idiom explanation
Little credit.
a deed as tiny as hair
after a considerable period of time - tiān cháng rì jiǔ
help at the loss of one 's life - liǎng lèi chā dāo
atone for one 's crimes by doing good deeds - dài zuì lì gōng
It is better to know than to know - qiǎng bù zhī yǐ wéi zhī