her voice was pleasant like those of nightingales and swallows
Yingshengyanyu, a Chinese idiom, Pinyin is y ī ngsh ē ngy à NY ǔ, which means the words of swallows and the songs of orioles. It originally describes the beautiful spring. Later, I used to describe the voice of young women. From the golden thread pool.
Idiom explanation
Oriole: oriole.
The origin of Idioms
In Yuan Dynasty, Guan Hanqing's "golden thread pool" wedge: "Niao Na is light and light, so it's suitable to depict the green screen. The language is like flowing warbler, and the sound is like Yan. Danqing, how can the sound be drawn?"
Idiom usage
As an object or attribute; used of women. When Song Jiang heard the voice of the warbler, which was not a man's voice, he came out from under the cupboard and saw that two girls in green were standing by the bed. The forty second chapter of the water margin by Shi Naian in Ming Dynasty
her voice was pleasant like those of nightingales and swallows
so subtle as to be difficult to guess what comes next - shén miào mò cè