Explanation of the meaning of "the plains are full of mourning": The original meaning is that the mourning geese are everywhere. In modern Chinese, it is a metaphor for the groaning and displaced victims everywhere. It is often used in conjunction with "the people are in dire straits."

Aihongbiànyě (Pinyin: āi hóng biàn yě) is an idiom. It first comes from "The Book of Songs·Xiaoya·Hongyan". It is used as a predicate, attributive, clause, and neutral word in the sentence to describe the homeless scene.

The meaning of the idiom is: the wild geese are mourning and mourning. The mournful roars. The sound is sad, the wild goose is as affectionate as a human being, and the lone goose is in a sad and sad state, as if it were a human being, so lonely that it makes people feel sad. The people of old China, oppressed by the "three big mountains", were in a difficult situation, had no livelihood, and were full of complaints.

Suffering from both natural and man-made disasters, we are both in the midst of fire and water. There are groaning and crying victims everywhere. They feel deeply that the world is muddy and their grief and anger are hard to express. This tragic scene, with mourners everywhere, is a reflection of the tyranny of feudal society. This tragic scene is gone forever.

The benefits of learning idioms well:

1. Enrich language expression skills: Idioms are treasures of the Chinese language, with strong cultural heritage and artistic charm. Learning idioms well can enrich our language expression ability and enable us to express our thoughts and feelings more accurately and vividly in communication.

2. Improve reading comprehension skills: Idioms are an important part of ancient Chinese culture and are widely used in various fields such as literary works and historical records. Learning idioms well can help us better understand ancient literary works and historical stories and improve reading comprehension.

3. Enhance cultural literacy: Idioms are treasures of Chinese culture and contain rich history, philosophy and wisdom behind them. Learning idioms well can allow us to have a deeper understanding of Chinese traditional culture and enhance our cultural literacy.

4. Enhance thinking ability: Idioms are usually highly abstract. By learning idioms, we can cultivate our thinking ability, exercise logical thinking and association skills, and improve our thinking flexibility and creativity. .

5. Increase opportunities for cultural exchanges: Idioms are an important part of Chinese language and culture. Learning idioms well can help us communicate better with Chinese people, enhance friendship, and broaden the fields of communication.