There are many omissions
It is an idiom with the pronunciation of L ò UJ ì ng ē NGL á n, which refers to deep night.
interpretation
Leak: the ancient instrument of dripping time. More: night time unit.
source
Yuan · Gao Wenxiu "Xiangyang meeting" the first fold: "straight and so the leakage, the streets quiet."
usage
It's late at night
Analysis of Idioms
Degree of common use: rare emotional color: commendatory words idiom structure: combined generation time: ancient idiom sound: more, can not be read as "ɡ è n ɡ". idiom shape: appendix, can't write "Lan".
There are many omissions
Be meticulous in speech and smile - yán xiào bù gǒu
Friendship between stone and gold - jīn shí jiāo qíng