Separated by weak waters
Separated by weak water, Chinese idiom, Pinyin is Ru ò Shu ǐ zh ī g é, which means that the metaphor is too far apart to reach. It comes from Hu Jizong's Shuyan story geography of Song Dynasty.
Idiom usage
As an object; in writing
The origin of Idioms
Hu Jizong of Song Dynasty wrote in his book Shuyan story · Geography: "it's far from here. If there is a weak water between the clouds."
Idiom explanation
Metaphor is too far apart to reach.
Separated by weak waters
try to shorten the neck of a crane and lengthen that of an owl -- to go against nature - duàn hè xù fú
know and observe all but stay obscure - zhī bái shǒu hēi