Jingkang Incident
Since Qinzong mistakenly removed the army to post in different parts of the country, the Jin forces eventually breached the walls of the Song capital, Bianjing, in 1127 and occupied the city in an event historically known as the Jingkang Incident ("Jingkang" was the era name of Emperor Qinzong.) Emperor Qinzong, along with his father Emperor Huizong and the rest of their family, were taken prisoner by Jin forces, marking the end of the Northern Song. Qinzong's brother Zhao Gou managed to escape to southern China, where he reestablished the empire as the Southern Song dynasty and became historically known as Emperor Gaozong.