Every Chinese Emperor Explained (Part 2: Tang to Song): The Rulers Who Built the Golden Age

Two dynasties, 600 years, and the rulers who turned China into the most powerful civilization on earth. The Tang Dynasty begins in 618 A.D. and for the next three centuries, it dominates Asia. At its peak, the Tang Empire stretched from Korea to Central Asia, the largest empire in the world. But the Tang didn't rise through luck. It was built by a handful of extraordinary emperors After the Tang falls, China fractures for 50 years, then the Song Dynasty reunites it in a completely new way. The Song becomes the wealthiest civilization in medieval history, inventing paper money, the printing press, and gunpowder weapons. Together, the Tang and Song represent the Chinese Golden Age, and understanding their emperors explains modern China. We're covering every major ruler, their wins, their mistakes, and the systems they built that still shape China today. Let's start with the man who founded the Tang, and the son who immediately overthrew him. The year is 617 A.D. The Sui Dynasty is collapsing under its second emperor's disastrous military campaigns. Li Yuan, a military governor in the north, sees his opportunity. He marches on the capital with his two sons. The Sui emperor is assassinated by his own officials. Li Yuan takes the throne and declares the Tang Dynasty in 618 A.D. Emperor Geazu, Li Yuan, spends his reign reunifying China. He defeats 12 rival warlords in just seven years. But Geazu's greatest problem is his sons. He has over 20 of them, and the most capable is his second son, Li Shimin. Li Shimin won most of the military campaigns that created the Tang. He expects to be named heir. But Geazu names the eldest son, Li Jiancheng, as crown prince. The brothers begin plotting against each other. In 626 A.D., Li Shimin acts first. He ambushes his two brothers at the Xiongnu Gate and kills them both. Geazu, facing a son who just killed his other sons, abdicates. Li Shimin becomes Emperor Taizong. Geazu's legacy. He founded the dynasty and reunified China. But his greatest contribution was his son. Now we come to the emperor. Most Chinese historians consider the greatest ruler in Chinese history. Emperor Taizong starts his reign knowing he seized power illegitimately. He has something to prove. His solution governs so well that no one can question his right to rule. He succeeds beyond any expectation. Taizong's first major reform. He actually listens to his ministers, even when they criticize him to his face. His chief advisor Wei Zheng famously contradicts the emperor over 200 times in their 17-year relationship. Taizong expands the civil service exam, the system where anyone, regardless of birth, can take a test to become an official. Before this, government positions were reserved for noble families. The exam breaks their monopoly on power. This is one of humanity's most radical political innovations. A meritocracy built into the government itself. Militarily, Taizong crushes the eastern Turkic Khaganate, the nomadic empire that had threatened China for decades. After the victory, Taizong is given the title Heavenly Khagan by the conquered nomadic tribes, a Chinese emperor ruling the steppe. Tang China under Taizong becomes the most cosmopolitan empire in the world. Persian merchants, Japanese students, Arab diplomats all in Chang'an. Chang'an's population reaches 1 million people. It is the largest city on earth, bigger than Rome at its height. Taizong's reign is called the reign of Zheng Yuan in Chinese history. It's the benchmark for good government. He dies in 649 AD, aged 51, still on campaign in Korea. His son Li Zhai becomes Emperor Gaozong. Emperor Gaozong is competent but not exceptional. What makes his reign historic is his wife. Wu Zetian enters the palace at age 14 as a low-ranking concubine of Emperor Taizong. When Taizong dies, she's supposed to become a Buddhist nun, the fate of childless imperial concubines. Instead, she seduces Gaozong, Taizong's son, who brings her back to court as his favored concubine. Within five years, she outmaneuvers the Empress Wang, has her imprisoned, and takes her place as Empress. Wu Zetian then removes every minister who opposes her, using a network of informants and secret police. When Gaozong has a stroke in 660 AD, Wu Zetian effectively begins ruling China in his name. After Gaozong dies in 683 AD, she rules through two of her sons as puppet emperors. In 690 AD, she makes her final move. She deposes her son and declares herself Emperor of a new dynasty, the Zhou. She is the only woman in Chinese history to hold the title of Emperor, not Empress, not Regent. Emperor. Her reforms are significant. She further expands the civil service exam, allowing even more commoners to rise. She also builds an extensive spy network. Any official who threatens her power faces immediate investigation. At 80 years old, a palace coup forces her to abdicate. The Tang dynasty is restored under her son Zhangzong. Her legacy is contested even today. A ruthless politician or China's greatest reformer? Probably both. After a decade of political instability, a new emperor rises who will take the Tang to its absolute peak. Emperor Xuanzang takes the throne in 712 AD after another round of palace coups. He is 28 years old. His first 30 years are extraordinary. He reforms the military, streamlines government, and triples government revenue. The Tang under early Xuanzang is the richest empire on earth. The Silk Road hums with trade from Japan to Persia. Xuanzang is also a patron of the arts. He personally plays music, writes poetry, and funds the Pear Garden Academy. The poets Li Bai and Du Fu both flourish under Xuanzang's patronage. This is the golden age of Chinese poetry. But in 740 AD, Xuanzang falls deeply in love with Yang Guifai, his own son's wife. He becomes obsessed, neglecting government, while Yang Guifai's family gains enormous power at court. Yang Guifai's cousin Yang Yuzhong becomes the chief minister, despite being corrupt and incompetent. Meanwhile, Xuanzang has been giving military power to a charismatic general named Enlushin. Enlushin controls three military provinces in the north, a combined force of 160,000 soldiers. In 755 AD, Enlushin rebels. He marches south with his massive army toward the capital. Chang'an falls within months. Xuanzang flees the capital in the middle of the night with only a small escort. As they flee, Xuanzang soldiers mutiny. They blame Yang Guifai and her family for the disaster. Xuanzang orders Yang Guifai strangled. She dies at age 38. He is 71 years old. He never recovers. His son takes over as Emperor Suzong and begins the long war to recapture the Tang cities. The Enlushin rebellion lasts eight years and kills an estimated 36 million people. 36 million people, that's more deaths than World War I in the 8th century. The Tang survives but it is fundamentally changed. Regional military governors now have real power and they don't give it back. Xuanzang's legacy, the golden age of Tang culture and the catastrophe that began its fall. The final 150 years of the Tang dynasty follow a depressing pattern. Weak emperors, powerful eunuchs, and rebellious governors. Eunuchs, palace servants who administer the inner court, begin to control emperor appointments. Between 806 and 873 AD, eunuchs install or depose seven Tang emperors. The emperors become figureheads. Meanwhile, regional governors become increasingly independent, running their provinces like personal kingdoms. In 874 AD, a massive peasant rebellion breaks out led by Huang Keou, a failed exam candidate. Huang Keou captures Chang'an in 880 AD. He massacres the aristocratic families who dominate the capital. The Tang emperor flees. A warlord named Zhu Wen eventually defeats Huang Keou and then turns on the Tang himself. In 907 AD, Zhu Wen forces the last Tang emperor to abdicate and has him murdered. The Tang dynasty ends. The Tang lasted 289 years. At its peak, it was the most sophisticated civilization in the world. Now begins the Five Dynasties and Ten Kingdoms period, 50 years of chaos that followed the Tang's collapse. In just 53 years, northern China is ruled by five different dynasties, each founded by military strongmen. Meanwhile, southern China breaks into ten independent kingdoms. No one controls the whole country. The chaos seems endless, until a general in the later Zhou dynasty has a very strange thing happen to him. Zhao Quanjian is a general in the later Zhou. In 960 AD, his troops claim there's a northern invasion and insist he take the throne. Whether this was staged or genuine, Zhao Quanjian doesn't fight it. He accepts the throne and founds the Song dynasty. He then does something remarkable. He reunifies China over the next 16 years almost entirely through negotiation. In 961 AD, Taizu hosts his most powerful generals for a banquet. He then politely asks them to retire. He offers them wealth, estates, and honor in exchange for giving up their military commands. They all accept. This is completely unlike every other Chinese dynasty, where rival generals were usually executed to prevent rebellion. Taizu restructures the military so that armies rotate commanders. No general can build personal loyalty among troops. He also dramatically expands the civil service exam, making it the primary path to government power. Taizu prioritizes civilian over military officials, a complete reversal of Tang priorities. Taizu dies in 976 AD under mysterious circumstances, possibly poisoned by his brother, who becomes Emperor Taizong of Song. Under Emperor Taizong and the emperors who follow, the Song consolidates its empire and begins an extraordinary economic revolution. The Song dynasty produces approximately 30% of the entire world's GDP at a time when Europe is in the Dark Ages. How? Four revolutionary innovations that would change the world. Paper money, printing, the compass, and gunpowder weapons. Paper money, jiaozi, is invented in Sichuan around 1000 AD. The Song government nationalizes it by 1024 AD. Baisheng invents movable type printing around 1040 AD, 400 years before Gutenberg. The magnetic compass, first used for navigation in the Song dynasty, enables China's merchant fleet to dominate Asian sea trade. Song China has a population of 100 million people, double that of Tang China at its peak. Cities grow massive. Hangzhou and Kaifeng both have populations over 1 million, making them the largest cities on earth. The Song is the first civilization to develop a genuine merchant middle class, with commercial law protecting business. But the Song has a critical weakness. Its deliberate downgrading of the military leaves it vulnerable to northern nomadic threats. The Song pays tribute to the Kitten Liao dynasty in the north, essentially buying peace instead of winning it militarily. This works for over a century, but it creates a dangerous precedent. Pay enough and threats go away, until they don't. The emperor who brings the Song to its cultural peak, and then destroys it with his own incompetence, is Emperor Huizong. Emperor Huizong takes the throne in 1100 AD. He is 18 years old and passionate about art, poetry, and calligraphy. Huizong is genuinely one of the greatest artists in Chinese history. His paintings are masterworks studied today. He invents a unique calligraphy style called slender gold, still taught in Chinese art schools today. He builds the Imperial Academy of Painting, collecting and cataloging over 6,000 artworks. But Huizong ignores government. His chief minister Cai Jing runs the empire and runs it corruptly. In 1115 AD, a new power rises in Manchuria, the Jurchen Jin dynasty, which destroys the Liao dynasty that Song had been paying tribute to. Huizong makes a catastrophic decision. He allies with the Jin to help destroy the Liao, then hopes to reclaim lost northern territory. The Jin destroys the Liao as planned, but then they turn their military directly on Song China. Huizong panics. He abdicates in favor of his son, hoping the Jin will negotiate with a new emperor. The Jin captures the Song capital Kaifeng in 1127 AD and takes both Huizong and his son Emperor Qinzong as prisoners. This is called the Jingkang Incident, the greatest humiliation in Song history, comparable to the fall of Rome. Huizong spends his final years as a prisoner in Manchuria. He dies there in 1135 AD, age 53. But the Song dynasty doesn't die. A third emperor escapes south and re-establishes the empire. Prince Xiaogu, a son of Huizong who wasn't captured, flees south and declares himself Emperor Gaozong of Southern Song. The Southern Song establishes its new capital at Lin'an, modern Hangzhou. It becomes one of the greatest cities in the world. Southern Song Lin'an has a population of 1.5 million people, the largest city on earth in the 13th century. The Southern Song builds the world's most powerful navy, both for trade and defense against Jin incursions by river. The great general Yue Fei becomes a national hero, defending Southern Song against Jin invasions. Yue Fei pushes north and nearly recaptures the old Song territories, but Emperor Gaozong orders him to stop. Gaozong fears that if Yue Fei recaptures the north and frees the imprisoned former emperors, Gaozong will lose the throne. Yue Fei is recalled, arrested on fabricated charges and executed in 1142 AD. He becomes China's greatest martyr. Yue Fei's story is still famous in China today. His four-character motto, serve the country with the utmost loyalty, is taught in every school. Despite the tragedy of Yue Fei, the Southern Song continues to thrive economically for another 130 years. Southern Song maritime trade reaches as far as the Persian Gulf and East Africa, the largest ocean trading network in the world. Song China exports silk, porcelain, and tea. It imports spices, ivory, and horses, becoming the hub of Asian commerce. The Song government collects tariffs from 1,500 registered trading ships annually, a sophisticated commercial state. But a new power is rising on the steppe that makes the Jin look like a minor problem. Genghis Khan unifies the Mongol tribes in 1206 AD. Within 30 years, his heirs will conquer China. The Mongols first destroy the Jin dynasty in 1234 AD with Song assistance, the same mistake Huizong made with the Jin. The Mongols then turn on the Song, but the Southern Song holds out for 45 more years, longer than any other conquest. The Southern Song resists through naval power, fortified river cities, and the world's first gunpowder naval weapons. The final Song emperor is a child, eight years old when his court flees to the sea in 1279 AD. At the naval battle of Yaman, the Song fleet is destroyed. A loyal official jumps into the sea holding the child emperor. Both drown. It is said that 100,000 Song loyalists jumped into the sea rather than surrender to the Mongols. The Song dynasty ends. The Song lasted 319 years. It was the wealthiest civilization in the medieval world, but it could not survive the Mongol storm. Now let's pull back and see what the Tang and Song emperors tell us about power, governance, and China's Golden Age. Pattern 1. The best Tang and Song emperors all prioritized merit over birth in selecting officials. Taizong expanded the exam system. Wu Zetian expanded it further. Song Taizu made it the cornerstone of his government. Pattern 2. Every dynasty that over-empowered the military eventually lost control of it. The Tang gave too much military power to regional commanders. The Song gave too little. Neither found the balance. Pattern 3. The greatest cultural achievements happened under politically strong emperors, not weak ones. Huizong was the greatest artist emperor in Chinese history, and his artistic obsession directly caused the dynasties near collapse. The Tang and Song together represent what Chinese civilization means—cosmopolitan, meritocratic, wealthy, and creative. Why does this matter today? Because modern China is trying to reclaim this Golden Age. The civil service exam survives in a direct line to China's modern Gaokao—the national college entrance examination. Paper money invented in Song dynasty is the ancestor of every currency system in use today. When Xi Jinping talks about the great rejuvenation of the Chinese nation, the image in Chinese minds is the Tang-Song Golden Age. The Belt and Road Initiative—China's modern Silk Road—is consciously modeled on the Tang dynasty's China's push for technological leadership—AI, semiconductors, quantum computing—mirrors the Song dynasty's innovation dominance. Understanding the Tang and Song emperors is not just history. It's the key to understanding what China wants to become again. Every Chinese student knows these emperors. Taizong is the good ruler. Xuanzang is the tragic ruler. Huizong is the warning. Yue Fei is taught to every child as the ultimate symbol of patriotism, betrayed by corrupt officials. Let's close with a final summary of every major emperor from this era—from Gyazu to the last Song emperor. Tang Emperor Gyazu, founder of the dynasty, reunified China after Sui collapse, abdicated to his son. 618–626 A.D. Tang Emperor Taizong, seized throne by coup, then governed so brilliantly that historians forgave him. 626–649 A.D. Emperor Gyazong, competent but overshadowed by his wife Wu Zetian, who effectively ran China from 660 A.D. 649–683 A.D. Emperor Wu Zetian, the only female emperor in Chinese history. Brilliant, ruthless, effective. 690–705 A.D. Tang Emperor Xuanzang, created the cultural Golden Age, then destroyed it through the An Lushan Rebellion. 712–756 A.D. Song Emperor Taizu, founded the Song, ended 50 years of civil war, paid off generals instead of killing them. 960–976 A.D. Song Emperor Huizong, greatest artist emperor, worst military ruler, captured by the Jin and died in exile. 1100–1125 A.D. Song Emperor Gyazong, re-established Southern Song after Jinkeng disaster, executed Yue Fei to protect his throne. 1127–1162 A.D. The last Song Emperor, child Emperor Bing, died at sea with his loyal official rather than surrender to the Mongols in 1279 A.D. Together, these emperors created six centuries of the most sophisticated governance system in the pre-modern world. Their legacy wasn't just Chinese. The civil service exam spread to Korea, Vietnam, and Japan. The printing press spread to Europe. Every time you use paper money, compass navigation, or print a document, you're using Tang and Song dynasty innovations. That is the real legacy of the Chinese Golden Age. Not just a great civilization that rose and fell, but innovations that became humanity's infrastructure. If you made it this far, thank you for watching. Subscribe to China Made Simple for a new video every week. Next week, every Chinese emperor part 3, the Ming and Qing dynasties, and how China's last emperors lost the world. And if you want to start from the very beginning, the Shang dynasty, the Zhou, the Qin, check out part 1 in the series. Hit the like button if you learned something today, it helps more people find the channel. And leave a comment which emperor surprised you most, Taizong's brilliance, Wu Zetian's audacity, Huizong's self-destruction. See you next week on China Made Simple, history that matters explained simply.