The Great Wall spans more than two thousand years and traverses 5,000 kilometers. The Great Wall, like the Pyramids of Egypt, the Taj Mahal in India and the Hanging Garden of Babylon, is one of the great wonders of the world.
Starting out in the east on the banks of the Yalu River in Liaoning Province, the Wall stretches westwards for 12,700 kilometers to Jiayuguan in the Gobi desert, thus known as the Ten Thousand Li Wall in China. The Wall climbs up and down, twists and turns along the ridges of the Yanshan and Yinshan Mountain Chains through five provinces--Liaoning, Hebei, Shanxi, Shaanxi, and Gansu--and two autonomous regions--Ningxia and Inner Mongolia, binding the northern China together.
As a cultural heritage, the Wall belongs not only to China but to the world. The Venice charter says: "Historical and cultural architecture not only includes the individual architectural works, but also the urban or rural environment that witnessed certain civilizations, significant social developments or historical events." The Great Wall is the largest of such historical and cultural architecture, and that is why it continues to be so attractive to people all over the world. In 1987, the Wall was listed by UNESCO as a world cultural heritage site.
Map of the whole wall constructions. The Chinese were already familiar with the techniques of wall-building by the time of the Spring and Autumn Period, which began around the 8th century BC. During the Warring States Period from the 5th century BC to 221 BC, the states of Qi, Yan and Zhao all constructed extensive fortifications to defend their own borders. Built to withstand the attack of small arms such as swords and spears, these walls were made mostly by stamping earth and gravel between board frames. Qin Shi Huang conquered all opposing states and unified China in 221 BC, establishing the Qin Dynasty. Intending to impose centralized rule and prevent the resurgence of feudal lords, he ordered the destruction of the wall sections that divided his empire along the former state borders. To protect the empire against intrusions by the Xiongnu people from the north, he ordered the building of a new wall to connect the remaining fortifications along the empire's new northern frontier. Transporting the large quantity of materials required for construction was difficult, so builders always tried to use local resources. Stones from the mountains were used over mountain ranges, while rammed earth was used for construction in the plains. There are no surviving historical records indicating the exact length and course of the Qin Dynasty walls. Most of the ancient walls have eroded away over the centuries, and very few sections remain today. Later, the Han, Sui, Northern and Jin dynasties all repaired, rebuilt, or expanded sections of the Great Wall at great cost to defend themselves against northern invaders.
The Great Wall concept was revived again during the Ming Dynasty following the Ming army's defeat by the Oirats in the Battle of Tumu in 1449. The Ming had failed to gain a clear upper-hand over the Manchurian and Mongolian tribes after successive battles, and the long-drawn conflict was taking a toll on the empire. The Ming adopted a new strategy to keep the nomadic tribes out by constructing walls along the northern border of China. Acknowledging the Mongol control established in the Ordos Desert, the wall followed the desert's southern edge instead of incorporating the bend of the Huang He.
Unlike the earlier Qin fortifications, the Ming construction was stronger and more elaborate due to the use of bricks and stone instead of rammed earth. As Mongol raids continued periodically over the years, the Ming devoted considerable resources to repair and reinforce the walls. Sections near the Ming capital of Beijing were especially strong.
During the 1440s–1460s, the Ming also built a so-called "Liaodong Wall". Similar in function to the Great Wall (whose extension it, in a sense, was), but more basic in construction, the Liaodong Wall enclosed the agricultural heartland of the Liaodong province, protecting it against potential incursions by Jurched-Mongol Oriyanghan from the northwest and the Jianzhou Jurchens from the north. While stones and tiles were used in some parts of the Liaodong Wall, most of it was in fact simply an earth dike with moats on both sides.
Towards the end of the Ming Dynasty, the Great Wall helped defend the empire against the Manchu invasions that began around 1600. Under the military command of Yuan Chonghuan, the Ming army held off the Manchus at the heavily fortified Shanhaiguan pass, preventing the Manchus from entering the Chinese heartland. The Manchus were finally able to cross the Great Wall in 1644, when the gates at Shanhaiguan were opened by Wu Sangui, a Ming border general who disliked the activities of rulers of the Shun Dynasty. The Manchus quickly seized Beijing, and defeated the newly founded Shun Dynasty and remaining Ming resistance, to establish the Qing Dynasty.
In 2009, an additional 290 kilometres (180 miles) of previously undetected portions of the wall, built during the Ming Dynasty, were discovered. The newly discovered sections range from the Hushan mountains in the northern Liaoning province to Jiayuguan in western Gansu province. The sections had been submerged over time by sandstorms that moved across the arid region.
Under Qing rule, China's borders extended beyond the walls and Mongolia was annexed into the empire, so construction and repairs on the Great Wall were discontinued.
Protection
In the last century, due to various environmental reasons and human activities, about one million square meters of land from Xinjiang to the Songneng Plains are changing from arable land into desert. This trend has extended past the Great Wall and spread to inside the passes. Also, large parts of the Great Wall's wall, beacon towers and watchtowers had been damaged or destroyed by the carelessness of men.
To preserve this architectural wonder and cultural heritage, many people suggest that China publicize the rich history of the Great Wall to the world and enact laws to protect it. Below are a number of steps that the Chinese government has taken and some suggestions for individuals to consider:
Measures taken by the Chinese Government to protect the Great Wall
Enact laws to protect the wall from further damage by men. Provide funds to be used for wall protection and preservation. What individuals can do to protect the Great Wall
Plant trees and remove trash to keep the areas fresh and clean. When visiting the Great Wall, do not leave behind anything besides your footsteps and take away nothing more than your memories.
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