What is the difference between the meaning of the basic words of the exhibition and Chinese?

FAIR
Fair is a traditional form of exhibition in English, that is, fairs and temple fairs. The Fair is characterized by “pan”, with merchants and consumers, agricultural products and industrial products. Markets and temple fairs have developed into modern times, and branches of trade and professional exhibitions have been called “exhibition”. The exhibition of large-scale, complex and comprehensive nature that inherits the characteristics of “pan” is still called fair. However, when it was introduced to China, it was translated into an "exposition." Therefore, the "expositions" of foreign countries must be seriously distinguished: they are modern large-scale comprehensive exhibitions or traditional village fairs.
EXHIBITION
In English, exhibition is a modern exhibition form developed on the basis of fairs and temple fairs. It is also the most widely used exhibition name, usually as a general term for various forms of exhibitions. EXPOSITION. Exposition originated in France and is an exhibition in French. In modern history, the French government first held an exhibition to showcase and publicize the strength of the country's industry. Since such exhibitions do not trade, mainly for propaganda, exposition has a “propaganda exhibition”. meaning. Since other countries have also organized promotional exhibitions, and because of the influence of French on some parts of the world, as well as the world's two major exhibition organizations: the International Fair Alliance and the International Exhibitions Bureau are all in France, so not only in French In the country, and in English-speaking regions such as North America, exposition is widely used.
SHOW
The original meaning of the show in English is to show, but in the United States, Canada and other countries, show has replaced the exhibition. In these countries, trade shows are mostly called show, and promotional exhibitions are called exhibition.
definition
"A temporary organization that publicly displays industrial and industrial products, handicraft products, works of art, books, pictures, and various important objects, specimens, models, etc. for public visits and appreciation by fixed or roving methods." This definition does not seem to be accurate and worth exploring.
Businessman definition
In the case of trade-oriented exhibitions, there is an American businessman who has defined this: in the shortest time, in the smallest space, to make the biggest business with the least cost. But this so-called definition is more like a description. The author's attempt is defined as the social form of product, service, and information exchange through display at a fixed or series of locations, on specific dates and deadlines. The information contains a lot of content, than propaganda achievements, propaganda policies, popularizing scientific and technological knowledge, establishing company image, understanding market development trends, and even obtaining information through improper means.