a fly in the ointment
It's a Chinese idiom. Pinyin is y í NGF è NDI ǎ NY ù, which means bad people frame good people. It comes from the banquet of Chuzhen forbidden house by Chen Ziang of Tang Dynasty.
Idiom explanation
Speckles: speckles, which extend to insults and defiles. Fly dung stained the jade. It means that bad people frame good people.
The origin of Idioms
Chen Zi'ang's poem Yan Hu Chu Zhen ban Suo in the Tang Dynasty: "if the green flies are the same, then the white Bi is unjust."
a fly in the ointment
A slow sparrow should make an early start. - bèn niǎo xiān fēi
bend the law to suit private interest - wǎng fǎ xùn sī
It's possible but not possible - kě wàng ér bù kě jí