In the Song Dynasty, established within the territory of the people's Republic of China and other national regime, such as established by the Khitan Liao, Jin Jurchen established, Dangxiang established Xixia. In 1127, Jin forces defeated Kaifeng, captured the emperor of the Northern Song Dynasty Emperor Huizong of song and song qinzong and his son, Emperor Huizong of another son Zhaogou emperor. Fled to the south, the establishment of the regime in Hangzhou, the history of the Southern Song Dynasty (AD 1127-1279)