a deed as tiny as hair
Mao fazhigong is a Chinese idiom.
It comes from the test form of seeking self written by Cao Zhi of the Three Kingdoms, Wei Dynasty: "stealing is not measured by oneself, and the purpose is to serve one's life used as an object; used to describe a small amount of credit
a deed as tiny as hair
keep the parents warm in winter and cool in summer - dōng wēn xià qìng
fall backwards with hands and legs in the air - sì jiǎo cháo tiān
have no alternative against one's will - pò bù dé yǐ
the dresses and ornaments of high officials in ancient times - yū qīng tuō zǐ