Great Wall of China: The Chinese Wonder of 10,000 Li

The Great Wall of China. This Chinese wonder took 2,000 years to build, and the real story is actually far more complicated, far more brutal, and far more interesting than the postcard version you've heard. It's a story about fear, about power, about the desperate, centuries-long effort of a civilization to protect itself from the open, wind-swept north. So let's go back to the beginning, the beginning of the Great Wall, before there was imperial order. Building a wall on this land started way beyond the establishment of a unified China during what is referred to as the Warring States period between 475 and 221 BCE. Each warring state was critically building its own walls, not to keep out invaders, but to keep out each other. The state of Qi built walls along its southern border to block Chu and Lu. Wei built the Hexi Wall along its western frontier against Qin. Zhao built a northern wall to stop nomadic raids. These weren't one connected system. They were dozens of separate, unrelated fortifications scattered across a landscape that was constantly at war with itself. Now, the northern frontier. That's where the story gets really dangerous. Above the farmland of northern China, the ground opens up into something completely different, a vast belt of grassland, the Eurasian Steppe, stretching from modern-day Manchuria in the east all the way to Hungary in the west. No mountains, no natural barriers, just open, flat land that goes on for thousands of miles. Out on those plains lived people who had developed a way of life completely unlike anything the Chinese agricultural states had. They were horse nomads. They didn't farm, no. They herded. They didn't have cities. They had camps that moved with the seasons. And they had something the Chinese armies couldn't match, speed, fast and furious speed. These were the Xiongnu, and they were a big problem. A Xiongnu raiding party could appear on the northern edge of a Chinese state, sweep through, take cattle, grain, people, and disappear before any organized response. You can't build a wall against that if you're fighting your neighbor at the same time. But what happens when all seven states become an empire under one ruler? That's exactly what happened in 221 BCE. After conquering all six other states and unified China for the first time in its history, Qin Shi Huang, the first emperor in 221 BCE, ordered all the walls between the old states demolished. China was one country now. Internal walls were a symbol of division. But the northern border needed something different, something to define where China ended and the world of the nomads began. He sent General Meng Tian north with an army of 300,000 soldiers. Their mission was to drive the Xiongnu out of the Ordos region, the great loop of the Yellow River that jutted north into steppe territory, and begin construction of a continuous northern barrier. In 215 BCE, Meng Tian's forces pushed the Xiongnu north across the Gobi. The Xiongnu leader Tou Man fled into the Mongolian plateau. Then the real work began. Meng Tian connected the existing northern walls of the old Qin, Zhao, and Yan states into one line. New sections were built across the gaps. The wall ran from Lintao in the west in what is now Gansu province all the way to Liaodong in the northeast, covering roughly 5,000 kilometers of territory. The original first reference to this project in Chinese records comes from the Shi Ji, the records of the grand historian. It says, Meng Tian was sent to command a host of 300,000 and built a great wall, constructing its defiles and passes according to the configuration of the terrain. It started at Lintao, reaching a distance of more than 10,000 li. That's how the wall got its Chinese name, Wanli Changcheng, the Wall of 10,000 Li, which is where my title of this video comes from. Now, who really built this wall? The first wave was soldiers, 300,000 of them stationed on the frontier, building while they patrolled. But soldiers alone weren't enough. The emperor conscripted peasants from across the empire, taken from their farms, their families, sometimes for years. Criminals were sent north as a form of punishment. A Ming-era historical account, which likely reflects earlier practice, records that if a convicted criminal died before completing his sentence on the wall, a family member had to take his place. In the Qin dynasty alone, historians estimate that over one million people worked on the wall at various stages. That was approximately one in 20 of the entire population of China. Many didn't come home. The story of Meng Jiangnu is a well-known legend about this. Her husband, Fan Xiliang, was conscripted to build the wall. She walked hundreds of miles in winter to bring him warm clothes, only to be told that he had died and been buried near the wall. Her grief was so overwhelming, so total, that the section of wall above his body cracked open from her weeping, revealing his bones so she could give him a proper burial. Archaeology has found no evidence of human remains inside the wall's structure. The bodies are near the wall, not in it. But the legend endures because it captures something real. For the people conscripted to build this thing, the Great Wall was not a symbol of pride. It was a sentence. The Qin Wall was built mostly of rammed earth, layers of soil packed down hard between wooden frames, sometimes reinforced with stone in rocky terrain. Fast to build, functional, but not built to last millennia. When Qin Shi Huang died in 210 BCE, within four years, the dynasty was gone. The wall was left largely ungarrisoned, and it began to decay. The dynasty that emerged from the chaos of Qin collapse was the Han, and the Han inherited Qin's northern wall and the northern problem. The Xiongnu had not gone away. If anything, while the Chinese had been fighting each other after the Qin collapse, the Xiongnu had been getting stronger. Under the chieftain Mo Dun Danyu, they had unified the steppe tribes into a confederation that could field hundreds of thousands of mounted warriors. In 200 BCE, Emperor Gaozu led an army north to confront them personally. They were ambushed at the Battle of Baideng, surrounded for seven days and forced to negotiate their way out. They agreed to send Chinese princesses to marry Xiongnu chieftains and pay annual tribute in silk, grain, and wine. You can watch the full story about this in my video about the Han dynasty, but this arrangement didn't last forever. When Emperor Wu, or Yi Wudi, came to the throne in 141 BCE, he decided to fight back properly. He launched a series of major military campaigns into Xiongnu territory. In 119 BCE, his generals, Wei Qing and the young cavalry prodigy, Huoku Bing, drove the Xiongnu deep into the Mongolian plateau in a campaign covering 1,500 kilometers of steppe. Following each military success, the Han built. They extended the wall westward, past the Yellow River, through the Hexi Corridor, that narrow band of habitable land between the Gobi Desert and the Tibetan Plateau, and all the way to the Yumen Pass at Dunhuang. Why Dunhuang? Well, it's because beyond the Yumen, the Silk Road began. From around 130 BCE onward, under Emperor Wu's orders, Chinese merchants, envoys, and soldiers were moving along trade routes that connected China to Central Asia, Persia, and eventually Rome. The Han Wall became the spine of this network, a line of watchtowers and garrison forts stretching across the desert, protecting caravans from bandits and nomadic raids, regulating who was allowed through the gate. The wall had become something more than a military barrier. It was infrastructure. The Han Wall, in its total extent across all its phases of construction, stretched further than any other dynasties, perhaps over 10,000 kilometers, including extensions and branches. Very little of it survives today. Built mostly of compacted earth and reed matting in the desert sections, it has eroded into the ground over 2,000 years. You can still find traces of Han beacon towers at Dunhuang if you know where to look. But the Grand Han Wall exists now, mostly in archaeological surveys and satellite imaging. After the collapse of the Han, China was fragmented for nearly four centuries. But the northern problem never went away. The northern dynasties, a succession of states that controlled northern China between the 4th and 6th centuries, all built walls of their own, though often further south than the old Han line. The Northern Qi Dynasty in the 550s constructed over 1,600 kilometers of new wall in just a few decades. This is a major construction campaign that gets very little attention in popular history. The Tang Dynasty, which followed, largely stopped building walls. Tang emperors preferred a different strategy. They recruited nomadic cavalry into their own armies and used military offensives deep into steppe territory. It worked for a while. But the Tang collapsed too in 907. Then came the Song, and then the Nujianjin, and then the wall's greatest test and its greatest embarrassment, the Mongols. Genghis Khan's forces didn't just push through the wall. They pushed through the entire concept of the wall. They were faster, more mobile, and more strategically flexible than any defensive line could accommodate. By 1215, they had taken Beijing. By 1271, Genghis's grandson Kublai Khan established the Yuan Dynasty as rulers of all China. The Great Wall hadn't kept them out. For the Mongols, who controlled territory on both sides of the northern frontier, the wall was just a geographical feature. Soldiers were stationed on it to protect Silk Road trade routes, not to defend China. The wall had become, for the first time, essentially decorative. But it wouldn't stay that way for long. In 1368, a Han Chinese rebel leader named Zhu Yuanzhang drove the Mongols out of China, declared the Ming Dynasty, and began a reconstruction project that would define how the world thinks about the Great Wall to this day. The Ming emperors were haunted by the Mongol occupation. They had spent 98 years under foreign rule. They were not going to let it happen again. In 1421, Emperor Yongle moved the imperial capital from Nanjing in central China to Beijing. In strategic terms, this was a bold statement. The emperor was daring the Mongols to come and take him. In practical terms, it meant the wall was now literally the last line of defense before the palace. That changed everything about how the Ming built. Earlier walls by the Qin, the Han, and most of the Middle Dynasties were primarily rammed earth. The Ming Wall, particularly from the late 15th century onward, was built with fired brick facing over an earthen core with stone foundations and granite facing in mountainous sections. It was heavier, stronger, and far more expensive. It was mortared together with a mixture that nobody had used before, sticky rice. Scientists at Zhejiang University analyzing samples from Ming-era wall mortar discovered that builders had added glutinous rice, also called sticky rice, to the standard mixture of slaked lime and water. This created the world's first composite organic-inorganic mortar. The result was a binding agent more dense, more water-resistant, and more earthquake tolerant than pure lime mortar. Sections of the Ming Wall built with this mixture are still structurally sound today. The rice supply for construction was sometimes commandeered from local farmers, an unpopular but apparently non-negotiable imperial requirement. The bricks themselves were also stamped. Every brick carried the name of the worker who made it and the supervisor who approved it. If a brick failed, crumbled, cracked, or was found below specification, the responsible worker could be tracked down and punished. The man most responsible for the wall you see in photographs and videos today is a general named Qi Jiguang, who took command of the Zhejiang Military District, the section of the wall north of Beijing, in 1567. Qi Jiguang was a military innovator who had spent years fighting Japanese pirates along China's coast. He understood combined arms tactics, organized logistics, and the importance of morale. When he looked at the existing wall, he saw a defensive structure that was still fundamentally passive. It could slow an enemy, but not stop them if they got over. Between 1569 and 1573, he oversaw the construction of thousands of hollow watchtowers. The Kongxin Ditai, hollow enemy towers along the wall's length. These were not just observation posts. Each tower had arrow slits on all four sides, a sleeping area and weapon storage on the ground floor, an open fighting platform on the roof, and in many cases, a small raised shelter for long-term garrison use. Soldiers could shelter in the towers during storms, store food and ammunition, and repel enemy forces, even if the wall itself was breached. The signal system that connected these towers was, by pre-modern standards, genuinely fast. Beacon towers were constructed at intervals, roughly every 10 kilometers, always on high ground. By day, they burned dung smoke, which produced a thick, dark column visible for miles. By night, they lit fires. The number of smoke columns or fires indicated the size of the enemy force, one for a hundred soldiers, two for 500, three for a thousand, and so on. Flags and lanterns provided backup signals in poor visibility. A warning signal from the far western frontier could reach Beijing in under 24 hours. That is faster than most pre-modern communication systems anywhere in the world. At the wall's peak in the late Ming period, roughly one million soldiers were stationed along its length in a series of garrison towns and military districts. The wall was not just a physical barrier. It was a system, an integrated military infrastructure By the 1630s, the Ming dynasty was in serious trouble. Internal rebellions were spreading across the country. A rebel leader, Li Zicheng, had raised a massive army in the northwest and was marching on Beijing. At the same time, in the northeast, beyond the wall's eastern end at Shanghai Pass, a Nujian general named Nuer Hachi had been building a new state since the early 1600s. His son, Huang Taiji, renamed his people the Manzhou and his dynasty the Qing. By the 1640s, the Qing were the most powerful military force in northeast Asia. They had already penetrated the wall several times through gaps and bribes, but they hadn't been able to take and hold the interior. They needed someone to open the main door. In April 1644, Li Zicheng's rebel army entered Beijing. The last Ming emperor, Chongzhen, killed himself, and the Ming dynasty was over. The man stationed at Shanghai Pass, the critical gate where the wall meets the Bohai Sea, was General Wu Sangui. He was trapped between Li Zicheng's rebels to the west and the Qing forces to the east. He made a choice. He opened the gate. The Qing armies poured through Shanghai Pass. Within weeks, they had defeated Li Zicheng and seized Beijing. Wu Sangui had expected them to help restore order and then leave. Instead, the Qing stayed. They established their dynasty and ruled China until 1912. The wall had been betrayed, not breached. Under the Qing, the old problem the wall was built to solve no longer existed. The Qing were Manzhou, a people from beyond the wall. Their empire extended far north and east of the wall's line. They controlled Mongolia through a policy of alliance and cultural accommodation rather than military force, a strategy called Huai Ru or pacification. There was no one left to keep out. The wall fell into disuse. Local people pulled bricks for building materials. Watchtowers crumbled. Centuries of weather and neglect did what no army had managed to do by force. In 1984, the Chinese leader Deng Xiaoping launched a campaign with a simple slogan, Love Our Country, Restore Our Great Wall. It was the first serious modern effort to address the wall's deterioration. Restoration work began on key sections, particularly Ba De Ling north of Beijing, which had already been receiving visitors since the 1950s. In 1987, UNESCO designated the Great Wall a World Heritage Site. Each year, millions of tourists visit it, over 10 million annually at the Ba De Ling section alone. A comprehensive survey conducted in 2012 found that only 8.2% of the Ming-era wall is in good condition. About 30% has been destroyed entirely, and the rest ranges from poor condition to barely recognisable rubble. In villages along the wall's route, local people have been pulling bricks for building materials for three centuries. Farmland has swallowed sections. Unsupervised tourism, people chipping off pieces as souvenirs, walking on unstable sections, has accelerated the damage. In some remote areas, sand dunes are slowly burying what remains. The sections you see restored and maintained, Ba De Ling, Mu Tianyu, and Simatai, represent a small, carefully curated fraction of a structure that is, in most of its length, slowly returning to the earth. The Great Wall was built in fear. It was built to exclude, to define a hard line between us, the agricultural, civilised, walled Chinese world, and them, the nomads, the barbarians, the people of the open steppe. For over 2,000 years, it was a symbol of that division. Today, it does the opposite. It draws people in. Visitors from every country on earth travel to walk on its stones, to stand on the battlements where Ming soldiers once watched the horizon for dust clouds. The wall that was built to keep foreigners out has become China's most recognisable welcome to the world. When Beijing hosted the 2008 Olympics, the road cycling event ran through the Great Wall landscape. The closing ceremony footage featured the wall illuminated against the night sky. The symbolism was not accidental. A structure built out of fear had been repurposed as a statement of openness and pride. That transformation, from exclusion to invitation, from defence to identity, may be the most interesting thing about the Great Wall. That is it for this video about the Great Wall of China, the Chinese wonder of 10,000 Li. Thanks for watching. Click on the video on your screen to watch the story of the dynasty that started the Great War over 2,000 years ago. Like, share and subscribe to the channel.