an inch of silk and half a grain of rice -- a little bit
It's a Chinese idiom. Pinyin is C ù ns ī B à ns ù, which means to compare tiny things. It comes from the 40th chapter of scholars by Wu Jingzi of Qing Dynasty.
Idiom explanation
It's a metaphor for tiny things.
The origin of Idioms
Son can't pinch a penny to honor his father, but he has to spend his father's property. He really can't compare himself with others. He is extremely ashamed! (the 40th chapter of scholars by Wu Jingzi in Qing Dynasty)
an inch of silk and half a grain of rice -- a little bit
there is a crack to squeeze through - yǒu xì kě chèng
make the gaudy swallows and orioles pale with envy - yàn dù yīng cán
there is not the slightest error - háo lí bù shuǎng