Neither cold nor sour
Not cool but not sour, a Chinese idiom, Pinyin is B ù Li á NGB ù Su ā n, which means to describe indifference. From the red flag.
Idiom explanation
Dialect. It describes indifference.
Idioms and allusions
It comes from the 35th section of the red flag spectrum, a novel written by Liang Bin in 1957.
Discrimination of words
[pinyin code]: blbs
Neither cold nor sour