Things are rare and valuable is an idiom, which means that things are precious because they are rare. The source of this idiom is Lu Xun's "Morning Blossoms Picked Up at Dusk·Mr. Fujino". The explanation is as follows:

1. In the novel "Mr. Fujino", Lu Xun discussed the living conditions and ideological conditions of Chinese international students at that time by describing what an international student experienced when he entered Japan to study. In the process, he mentioned an idiom called "rare things are valuable" to describe a social phenomenon faced by Chinese international students at that time.

2. Thing refers to a certain item or thing, and rare means that the number of such items or things is very small. And expensive means that the value of this item or thing has become very high. The meaning of this idiom is that when the quantity of an item or thing is very small, its value will become very high because of its rarity, and it will be regarded as a treasure by people.

3. Rare things can be used not only to describe rare items in terms of material wealth, but also to describe certain talents or skills. For example, a person who has a special skill or talent that is highly regarded and sought after because it is rare in a certain field.

The broad and profound characteristics of Chinese idioms

1. The broad and profound nature of Chinese idioms is reflected in their wide range of sources. The sources of idioms cover many aspects such as historical stories, folklore, poems and songs, famous quotes, etc. There is a unique story or meaning behind each idiom, which makes the idiom highly expressive and contagious.

2. The broad and profound Chinese idioms are also reflected in their concise and concise expressions. Idioms usually consist of four characters. They are simple in form, but have profound meaning and strong expressive power. This concise and concise expression reflects the concise and implicit characteristics of Chinese culture. For example, the idiom "superfluous" means doing something superfluous, which has a negative effect.

3. The breadth and profoundness of Chinese idioms are also reflected in their profound cultural connotations. Idioms are an important part of Chinese national culture and reflect the values, historical traditions and cultural spirit of the Chinese nation. By learning idioms, we can better understand the connotation and characteristics of Chinese culture and improve our cultural literacy.