Long ago, a big war happened. 
Long ago, a big war happened in China. 

In 1127, a major war changed China. The Jin group attacked the Song dynasty. This time was called the Jingkang Incident. 
Before the war, the Jin and Song made a deal. They wanted to defeat another group called the Liao. The Jin won and took the Liao lands. Later, the Song wanted some of that land back. The Jin sold it for silk and silver.
In 1126, the Jin army attacked the Song capital. The city was called Bianjing. The Song leaders tried to pay the Jin to leave. The Jin left for a short time. But then the Jin attacked again. This second attack was much bigger. 
The Jin army was very strong. They took the city in early 1127. The Jin captured the Song leaders. They took Emperor Qinzong and his father, Emperor Huizong. The Jin also took many people from the palace. They took workers, artists, and even teachers. This event ended the Northern Song dynasty. Some family members escaped to the south. They started the Southern Song dynasty there.
The Jingkang Incident was a major event in Chinese history. It happened in 1127 during the Jin-Song wars. This event changed how China was ruled for a long time. It began when the Jin dynasty attacked the Song dynasty. The Jin leaders led a large group of troops. They moved toward the Song capital city named Bianjing. 
To understand the war, we must look at an earlier deal. In 1120, the Jin and Song made a military alliance. They worked together to defeat the Liao dynasty. The Jin won and took most of the northern lands. Later, the Song wanted a specific area called the Sixteen Prefectures. The Jin agreed to sell this land to the Song. They asked for 300,000 bolts of silk and 200,000 ounces of silver.
Trouble started growing between the two groups after the Liao fell. In 1123, a Jin general named Zhang Jue joined the Song. This caused great tension between the two dynasties. The Jin sent diplomats to find him and attacked three cities. A Song general named Wang Anzhong made a mistake during this time. He killed a man who looked like Zhang Jue to satisfy the Jin. This mistake led to more fighting and more war. 
The Jin army attacked the Song land in two main waves. First, they besieged Bianjing in early 1126. The Song leaders tried to pay a ransom to stop them. The Jin took the city of Taiyuan as a gift. For a short time, things seemed calm again. However, the Jin attacked a second time in late 1126. This second army was much larger and more organized. It included 150,000 strong forces sent by Emperor Taizong of Jin.
On January 9, 1127, the city of Bianjing finally fell. The Jin captured Emperor Qinzong and his father, Emperor Huizong. They also took many members of the imperial family. The Jin troops took many items from the palace. They took books, silk, and even musical instruments. They also took many people like teachers, doctors, and artists. This event ended the Northern Song dynasty. Some family members, like Zhao Gou, escaped to southern China. They started the Southern Song dynasty in a new capital called Lin'an.
The Jingkang Incident was a transformative period of conflict and loss. It occurred in 1127 during the Jin–Song wars. This event saw the Jin dynasty attack the Northern Song dynasty. The Jin forces besieged and sacked Bianjing, the Song capital. Bianjing is known today as Kaifeng in Henan province. This massive invasion caused the collapse of the Northern Song dynasty. It also changed the line of succession for the Chinese imperial family. 
The roots of this conflict began with a failed alliance. In 1120, the Jin and Song dynasties formed a military pact. They aimed to defeat the Liao dynasty together. The Jin would take northern lands, while the Song would receive the Sixteen Prefectures. To achieve this, the Song army cleared a large defensive forest. This left the border open and defenseless for future invasions. The Song army suffered defeats during this expedition. These losses revealed corruption and inefficiency within the Song imperial court.
Tensions grew after the Liao dynasty fell. In 1123, a Jin general named Zhang Jue defected to the Song. The Jin sent troops to stop him, but they were defeated. Later, Jin diplomats demanded Zhang Jue be returned. A Song general named Wang Anzhong killed a man who looked like Zhang Jue. He sent the head to the Jin to satisfy them. The Jin realized this was a ruse and attacked Song cities. Zhang Jue was eventually executed in the winter of 1123. By the fall of 1125, Emperor Taizong of Jin ordered a full-scale attack.
The Jin invasion happened in two distinct waves. The first siege of Bianjing began in February 1126. The Jin northern army, led by Wanyan Zongwang, crossed the Yellow River. The Song ruler, Emperor Huizong, abdicated to his son, Emperor Qinzong. To end the fighting, Qinzong sent his brother Zhao Gou for peace talks. The Jin took Zhao Gou hostage until a ransom was paid. The Song also gave the city of Taiyuan to the Jin. After this, the Jin forces briefly withdrew from the capital.
Peace did not last long after the first siege. Emperor Qinzong made a major mistake by sending a coded letter. He tried to invite former Liao nobles to form an anti-Jin alliance. The envoys immediately gave the letter to Emperor Taizong. This angered the Jin ruler and triggered a much larger second campaign. In September 1126, the Jin armies returned to Song territory. The western army, led by Wanyan Zonghan, sacked Datong within one month. The northern army also moved quickly through several satellite cities.
The second siege of Bianjing was much more devastating. The Jin sent a massive force of 150,000 soldiers. The city's defenses were unorganized due to a lack of experienced generals. Many skilled soldiers had been removed from the capital earlier. Emperor Qinzong also wasted time trusting an official who promised divine help. By mid-December 1126, the two Jin armies met at the city walls. On January 9, 1127, the city finally fell to the Jin forces. 
The aftermath of the fall involved massive loss and abduction. The Jin captured Emperor Qinzong and the retired Emperor Huizong. They also took many members of the imperial bloodline. Jin troops looted the imperial library and the palace decorations. They seized jade books, chariots, and ceremonial headgear. They also abducted 600 young girls and hundreds of musicians. Many specialists were taken, including doctors, astronomers, and painters. To spare civilians, the people gave the Jin gold, silver, and silk.
This incident fundamentally reshaped the map of China. The Northern Song dynasty ended with the fall of Bianjing. However, the Song dynasty did not disappear entirely. Some family members, like Zhao Gou, escaped to southern China. He became Emperor Gaozong and started the Southern Song dynasty. His new capital was located in Lin'an, known today as Hangzhou. Because many of Taizong's descendants were captured, the line of succession changed. The descendants of Emperor Taizu eventually returned to power.
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