In 1127, the Jinren invaded Bianliang, the capital of the Song Dynasty, abducted the two emperors of Huiqin and Qin and a large number of royal clans to the north, which was called "the disaster of Jingkang" in history. Zhao Gou ascended the throne in Yingtianfu, Nanjing in June 1127 and became Emperor Gaozong of the Southern Song Dynasty. At that time, the Southern Song Dynasty regarded Jin as a minister, and the official term of the Jin Dynasty against the Song was no longer called "Great Song" but "Jiangnan". In the face of this humiliation, the Southern Song society generally hated Jin.
In 1205, Song Ningzong changed the Yuan Kaixi, and took the reign of Song Taizu "Kaibao". In the second year of the Jubilee, Han Dong, the power minister of the Southern Song Dynasty, launched the Northern Expedition. But the Southern Song army failed. The Jin Dynasty forced the Song Dynasty to cede territories, claim officials, return to prisoners of war, commit crimes, and increase the age of money. Song Ting had to offer Han Tong's head to the gold man for peace. Due to the war against the Song Dynasty in the South, the Northwest was also involved in the Western Xia Dynasty, so it was difficult for the Jin Dynasty to fully integrate the northern grasslands. At this point in time, Peer Zhijin Hebule (the great-grandfather of Genghis Khan) took the opportunity to stand on his own on the Mongolian grasslands. In 1127, the neighboring tribes of Mongolia elected him as Mongolian minister, and then called him "Hebrekhan". The Jin Dynasty wanted to eliminate this force, but was defeated many times. The gold master could only recognize Mobei's relative independence.
The ruler of the Jin Kingdom was afraid of Mongolia. After Jin Xuanzong came to power, he moved the capital to Nanjing Bianliang and abandoned the central capital. The Mongolian army took the opportunity to send troops south to conquer the Central Capital. In the following year, most of the areas north of the Yellow River were all occupied, and the strength of the Kingdom of Jin was not as good as before. Hou Meng accepted the conditions of Jin Guo's negotiation and began the Western Expedition. At this time, Jin Xuanzong went south to attack Song in a big way, but failed. In 1224, Jin Xuanzong died and Jin Aizong succeeded. He stopped the war with the Southern Song Dynasty and Xixia and went all out to deal with Mongolia. Soon after Genghis Khan's death, Xixia was wiped out by Mongolia. In 1231, the Mongolian Wokuotai sent Torrey led a 40,000 army to enter the Kingdom of the Jin Kingdom through the Southern Song Dynasty. After the Mongol army defeated the Jin army in Junzhou, Ai Zong fled Bianliang to Caizhou.
In 1233, Mongolia met in the Southern Song Dynasty to jointly cut gold, and the Southern Song Dynasty cooperated with Mongolia after weighing. In 1234, the Mongol and Song coalition forces invaded Caizhou,Jin Aizong hanged himself. Before his death, the Legend of Ai Zong was located in Wanyan Chenglin, the last emperor. When he held the succession ceremony, the Mongol and Song coalition forces had already invaded the city, Wan Yan Chenglin died in battle, and the Kingdom of Jin was destroyed.
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