The Great Wall of China is more than 6,000 kilometers long. It winds     1     (it) way from west to east, across deserts, over mountains, through valleys     2     at last it reaches the sea. The Great Wall has a history of over twenty-centuries. The first part of it     3     (build) during the Spring and Autumn Period. During the Qin Dynasty,     4     (keep) the enemy out of his empire, Emperor Qin Shihuang had all the walls     5     (join) up. Thus, the Great Wall came into being. The Great Wall is wide enough at     6     top for five horses or ten men to walk side by side. Along the wall are watchtowers,     7     soldiers used to keep watch. Fires were lit on the towers as a     8     (warn) when the enemy came.

It was     9     (extreme) difficult to build such a wall in the ancient days without any modern machines. All the work was done     10     hand. Thousands of men died and were buried under the wall they built. The Great Wall was made not only of stone and earth, but of the flesh and blood of millions of men.

Archaeologists have excavated the ruins of house foundations     1    (date) back more than 5,000 years in the Yangshao Village site in China’s Henan Province.

“The house was once a large building     2     rammed earth walls that might have covered more than 130 square meters.     3     is believed that it belongs to the late Yangshao Culture period,” said Li Shiwei from Henan Provincial Institute of Cultural Heritage and Archaeology,     4     is in charge of the excavation (发掘) site.

“This is the first time that large house ruins     5    (discover) since the excavation of the Yangshao Village site in 1921. The findings can provide new materials for studying     6    (type), shapes and building techniques of houses during the Yangshao Culture period,” Li said.

In 1921, the first excavation on the Yangshao Village site, which is Mianchi County, Henan Province,     7    (mark) the birth of modern-Chinese archaeology.

Originating around the middle reaches of the Yellow River, the Yangshao Culture is considered     8    (be) an important stream of Chinese civilization and is     9    (wide) known for its advanced pottery-making technology.

The     10    (four) archaeological excavation on the Yangshao Village site began on Aug. 22, 2020, and is still in progress.

In ancient times, builders and architects in Beijing     1     (rely) on five colors to add life to their creations: red, yellow blue white and gray. These colors were connected     2     five different elements: metal, wood, water, fire, and earth. The Chinese sage (圣贤) Laozi said that five colors make people blind, so in architectural art, it’s suggested that no more than three main colors should     3     (use) for a design; otherwise, it would look too busy. Then red, yellow and blue gradually became the main colors in the Forbidden City.

Red, the color of fire and blood has long been important in Chinese symbolism.     4     (traditional), red represents warmth and the highest amount of energy. The association of red with good fortune is the reason     5     the color red is important in wedding, New Years, and other important     6     (celebration).

Yellow was another obvious color in old Beijing,     7     (stand) for the power of emperor. The Yellow Emperor is the mythological (神话的) forefather of the Chinese nation while archaeologists find the     8     (early) examples of Chinese civilization in the Yellow River Basin.

The color blue symbolized heaven and heavenly blessings with the best example of the rooftops of structures at the Temple of Heaven.     9     was discovered that blue had a high sensitivity to light, and was the perfect color used     10     (create) copies of drawings.