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
hide one 's capacities and bide one 's time - tāo guāng yǐn huì
a far-sighted plan that goes deep into the most probable changes in the years to come - jì shēng lǜ yuǎn
drag in all sorts of irrelevant matters - dōng lā xī chě