What is the special meaning of "Liu" in ancient poetry?

The image of willow is suggestive and enlightening.

Willow "and" stay "are homophonic, and folding willow to bid farewell contains the meaning of pouring out and retaining, expressing the feeling of being reluctant to leave as soon as possible.

Chanting willow praises spring scenery and sings nature.

Expressing the feeling of cherishing spring and hurting spring by willow.

Describe women and love through willows.

Since the Han Dynasty, people have often expressed their feelings of parting by folding willows, which triggered the yearning for distant relatives and the homesickness of travelers.

For example, the poem "Farewell" tested by 1987: the willows are hanging on the ground and the flowers are flying in the sky. Willow branches are broken and flowers are flying. Will pedestrians come back?

Because of the homophonic sound of "willow" and "willow", the ancients often used folding willows to express their deep feelings of farewell.

This custom began in the Han Dynasty and flourished in the Tang Dynasty. In the Han dynasty, there was a tune called "Folding Willow", which expressed farewell feelings in the form of playing. Baling Bridge in Xi 'an in Tang Dynasty is the only place for people to leave Chang 'an when they go to all parts of the country. Baling Bridge is surrounded by willows. It has become a famous place for the ancients to bid farewell to the willows, such as the poem "Willow color every year, Baling hurts." Later generations took "Baqiao Folding Willow" as the source of farewell allusions. Therefore, there is a poem of "Qingyang Farewell to Strangers", and Liu Yong expressed his sadness of parting with "Where did you wake up from the wine tonight, Yang Liuan, and the waning moon in the breeze" in Lin Yuling.

"When I hear the sound of the flute breaking the willow, I don't see the spring scenery", which means that the tune of "breaking the willow" in the flute spreads far away, but I don't see the willow green and spring scenery, so as to express my feelings of sighing for the spring.

"Who can't afford to miss home?" It's about hearing the tune of "folding willow" tonight. Who doesn't miss his hometown?

From the aesthetic point of view, willows are swaying in the wind, shy and dependent on people, with thousands of postures and customs, which are very feminine, so the ancients often use willows to describe women's posture and appearance.

For example, in Bai Juyi's Song of Eternal Sorrow, "Petals are like her face, willow leaves are like her eyebrows", and "Cherry Su Fan mouth, willow leaves are small waist" in Bai Juyi's Unforgettable Love.