In ancient times, the weather was very hot. The sun has become a major disaster for human survival. Just then, a catastrophe occurred. The cause is caused by an asteroid hitting Earth. The asteroid was later named Gonggong, and was thought to be the god of water, a star that competed with the sun for dominance over Earth. Because, this asteroid, called Gonggong's, hit the Earth exactly when it hit the Buzhou Mountains and the surrounding areas. Due to the height of Mount Buzhou, people at that time believed that Mount Buzhou was a pillar of heaven. Knocking down mount Buzhou, the pillar of heaven was gone. So the sky collapsed and the earth sank.
Huainanzi. When the Meditations recorded this impact event, Yun: "In ancient times, the four poles were abandoned, the Kyushu was split, the sky was not overturned, the earth was not carried around, the flames were not extinguished, and the waters were vast and endless. Beasts of prey eat people, and birds grab the old and weak. "Huainanzi. The Astronomical Precepts say: "The pillar of heaven is broken, and the earth is broken." The sky tilts to the northwest, so the sun, moon, and stars move, and the earth is dissatisfied with the southeast, so the water and dust return. That is to say, the asteroid's impact on the earth not only caused the earth to collapse partially, but also changed the speed at which the earth orbited the sun and the earth rotated. This caused a huge catastrophe throughout the planet. "The land is not satisfied with the southeast, so the water is dusty and dusty." The global tsunami is enormous, long-lasting and the resulting global rain and flooding. After experiencing a disaster caused by a heat, people have ushered in another huge flood.
Primitive people who experienced the Cataclysm lived in caves at the time, and later, with the decline of prey and the advent of farming, the new problem of living became the biggest problem.
The public ownership of the public life of the nomadic group is to live in a natural cave, however, the group cave life is not conducive to agricultural life. Therefore, going out of the cave and cultivating the fields in the alpine wilderness has become the natural direction of human beings.
This involves changing the way you live. The wisdom learned by human beings is also very broad, and after summing up the experience, the Nuwa clan was inspired by the turtle to support the turtle cover with four legs, leading humans to use the cut trees like turtles to support the four poles, and the top was like a turtle cover, covering the tree techniques and leaves.
In order to prevent the wind from blowing the tree skills and leaves away, the tree skills and leaves are covered with dirt.
This is the original house of man after he came out of the cave. However, such a house can not withstand heavy rainstorms, once washed away by the rainstorm, all the soil is washed away, the tree skills and leaves covered on it will be blown away by the wind, the house is exposed again, and people still live in the hardships of wind and rain and sun.
Therefore, the Nuwa clan summed up the experience and found that the limestone used to protect the fire was burned into white ash and used on the mud roof to achieve the effect of not leaking rain. The Nüwa clan led people to promote this method in large quantities, which is called "Nüwa Supplementing Heaven", and we saw with our own eyes the lime layer of Nüwa's "Patching Heaven" in the ancient human site of Majiayao in Lintao, Gansu Province.
The Nuwa clan successfully brought ancient humans from cave life to housing life, which was a great residential revolution in human history and, of course, a revolution in the history of human architecture. Modern architecture has cement, that is, concrete, and before the birth of concrete, lime architecture once dominated the architectural history of mankind for thousands of years.