out of the blue
Unexpectedly, the Chinese idiom, Pinyin is ch ū h ū y ì w à I, which means to be used in the unexpected. From the story of heroes and heroines.
The origin of Idioms
The 25th chapter of biography of heroes and heroines by Wen Kang of Qing Dynasty: "I don't want the girl to make a fuss, but I'm so surprised that I can't catch the slip of the tongue."
Idiom usage
It can be used as a predicate, attributive or adverbial "Accident". A few days later, I met them. It was a surprise to them. Guo Moruo's Hong Bo Qu (Chapter 1, 3)
Analysis of Idioms
[synonym]: unexpected, unexpected [antonym]: be prepared in case of emergency
out of the blue
make up a deficiency by funds from elsewhere - yí dōng bǔ xī
in the family of a general there are more generals -- like produces like - jiàng mén yǒu jiàng