What is the * * * language of the warbler at the window?

The warbler in front of the window talks to the swallow flying outside the curtain.

this sentence comes from a rhyme song; Duiyun song, also called Duiyun song, is a short and exquisite language form and a unique expression of Chinese traditional culture. The poems we have studied and the couplets we often see are Duiyun songs. As long as the words in rhyme songs are relative or similar, such as heaven and earth, sun and moon.

Duiyun Song (going back and forth)

Going back and forth, going back;

rain and snow affect wind and frost, pine shoots affect bamboo leaves, and grass huts affect Chai Fei.

tidal fluctuation, monthly profit and loss;

Twilight is facing Zhaohui, and the warbler speaks in front of the window, and the swallow flies outside the curtain.