Study and analyze the development history of steel fire doors

The history of the development of nestling culture is as follows: single tree nests are the most common, tree nests are the most common, and dry fence buildings are the most common. For the sake of poor natural conditions, the ancient ancestors derived the steel fire door and the two residential systems of "South nest and North residence". These two systems gradually converge and evolve into the residential form seen today. However, there are still various regional features in today's residential buildings, These characteristics reflect the process of its evolution from one of the above systems to the present. It is very meaningful to explore this evolution process and restore the possible forms of its various periods. The Yi Xia theory is different from the "Yi Xia discrimination" in the southern indigenous literature since ancient times, which distinguishes itself ("Zhuxia") from the surrounding Minority Nationalities ("Siyi"). However, historical, archaeological anthropology and related research are not clear.

Ju nongwen originated in East Asia and is the bottom of Chinese, while bronze nomadic writing comes from central or West Asia and is the bottom of Chinese, that is, Chinese is actually a mixture of "Yi" and "Xia". Fu Sinian pointed out in the theory of Yi Xia things: "Xia Shi is a Western or alliance, and has only been to the east or several times; On the contrary, Ling Chunsheng also found that the basic level of Chinese is the marine culture in the east coastal area, that is, the "Yi" culture, while the "Xia" nation replaced the Lu Culture: "the land coast of Asia and the Mediterranean is the origin of the ancient culture around the Pacific Ocean, so it can be called the marine culture, and its nationality is called Yi culture in the north, The southern language is manyue or Yue... The land language from the Qinghai Tibet Plateau and the earth plateau is Chinese. It came into contact with the Haiyan language in the East. After two thousand years of, it has formed the Chinese original text, which is now replaced by the Yin Shang language that can be determined in Archaeology... The Chinese original text composed of the Huaxia and Dongyi sea and land languages in the North China Plain has defeated the Nanyi language in the south of the Yangtze River and Lingnan, but the connotation of the two languages has not been completed so far There is no sign that bronze and nomadic literature are bred in Korean tattooed pottery literature and Chinese Neolithic literature. Scholars have clearly recognized that bronze and nomadic literature originated from China or East Asia for a long time. Korean scholars also recognize that their bronze or nomadic literature came from China or central Asia.

However, the specific time and way of transmission are still controversial. Middle school students also recognize the origin relationship between Chinese and Korean bronze inscriptions, but there are still different views on the origin of Chinese bronze inscriptions. However, more archaeological discoveries in recent years show that a series of new inscriptions have appeared in East Asia since summer: bronze, cattle, domestic horses, goats, sheep, wheat, brick, gold worship, Zhi stone tomb, cremation and heaven worship, According to a comprehensive study, the cultural factors of settled agriculture such as stone tools, pottery, rice, millet, pigs, dogs, half land or dry fence houses and earth pit burial can be traced back to years or even tens of thousands of years ago in East Asia, while the cultural factors related to nomadic lifestyle such as bronze, wheat, cattle, sheep, horses, cremation and gold ware can be preliminarily determined no earlier than four or five thousand years ago, The settled agricultural literature in the meso Neolithic Age originated locally, while the nomadic literature in the bronze age was an external factor. The survival of the southern residential literature originated from the communication and collision between the bronze nomadic Literature (Xia) and the settled agricultural literature (Yi), which naturally had an impact on the residential literature. With the Chinese original text becoming the mainstream, the Han nationality (Zhuxia) in the Central Plains had an impact on the surrounding indigenous people (Siyi) Therefore, in the long history, in the process of several southward migration of the north, the northern nomadic literature and the southern rice agricultural literature have been superimposed for many times.