The Sang Yu Family was a metaphor for the poor. This idiom originated from the explanation in the Idiom Dictionary1. The term " mulberry pivot and wengyou " was used to describe a poor family with simple doors and windows. Therefore, the meaning of Sangyu Family referred to families with difficult living conditions.

The time of mulberry and elm was an idiom, which meant the later years of a person. This conclusion.
Sang Yu Shi was an idiom, and its source was the Biography of Feng Yi in the Book of the Later Han Dynasty. The literal meaning was that the sun shone on the mulberry and elm trees at sunset, referring to old age. It was a metaphor for the later stages or later stages of things. To be specific, it meant that one had lost in a certain aspect at the beginning, but was compensated in the end. This idiom is often used to describe people who have experienced some setbacks or failures in life, but have finally succeeded or made up for it in other aspects.
The meaning of the story was to describe the old age. In ancient times, mulberry elm originally referred to the time before sunset when the light shone on the branches of mulberry elm trees. Later, it was extended to the time of sunset. This allusion was often used to describe the later stages of a person's life.
Sang Yu comes from the Biography of Feng Yi in the Later Han Dynasty.
Mulberry elm's meaning and symbol were sunset, old age, and sunset. In literary works, mulberry and elm were often used as a metaphor for old age or twilight. The word originally referred to mulberry trees and elm trees, but later evolved to refer to the end of the day or old age. Mulberry elm could also mean success and hope for the future. In some poems, Sang Yu was also used to describe the final stage of the matter. In general, the meaning and symbol of mulberry elm was related to sunset, dusk, and old age.
Mulberry elm in the evening refers to the scene of the sun shining on the mulberry elm trees at sunset. The mulberry elm here was a metaphor for old age or old age.
The simplest explanation for not seeing mulberry elm trees was not seeing mulberry elm trees in the evening.
In ancient times, mulberry had a rich meaning and symbolic meaning. It not only symbolized the primitive life and fertility of the ancient people, but also symbolized the sweet and sad love between men and women. Sang was also regarded as the embodiment of good fortune, but also symbolized death and sorrow. In ancient literature and art, mulberry represented a strong sense of home and also symbolized the eternity of time. Mulberry trees were closely related to their hometown, so they were used as a metaphor to represent homesickness. In ancient poetry, there were also descriptions of mulberry trees as a metaphor for the virtue of justice. In general, mulberry symbolized tenacity and perseverance in ancient culture, representing the eternity of life.
The pronunciation of mulberry was sāng, which meant a kind of fallen leaf shrub. The leaves could be used to feed silkworms, the ears were sweet and edible, the wood could be used to make furniture or farm tools, the skin could be used to make paper, and the leaves and fruits could be used as medicine. It was grown in most parts of China. Besides, Sang could also be a surname.