Rubber nail
As a Chinese idiom, the phonetic alphabet is Xi à NGP í Dingzi. The self contradictory midnight, which means "soft nail", refers to rebuke or refuse in a subtle and obscure way. From the fourteenth of Mao Dun's midnight.
The origin of Idioms
Mao Dun's midnight 14: "the second time Tu Wei Yue heard that Wu Sun Fu was very sarcastic about him, he responded with a rubber nail."
Idiom usage
He had to give up when he hit a rubber nail.
Analysis of Idioms
Soft nail
Rubber nail
depending on the superficial comprehension to make an appraisal of profound truth - yǐ shēng liáng dàn
practise bribery or receive bribes publicly - huò lù gōng xíng