 The Song disbandment of the Great Chu and execution of Zhang Bangchang <unk> the Jurchens and violated the treaty that the two parties had negotiated . The Jin renewed their attacks on the Song and quickly <unk> much of northern China . In late 1127 Gaozong moved his court further south from Yingtianfu to Yangzhou , south of the Huai River and north of the Yangtze River , by sailing down the Grand Canal . The court spent over a year in the city . When the Jurchens advanced to the Huai River , the court was partially evacuated to Hangzhou in 1129 . Days later , Gaozong narrowly escaped on horseback , just a few hours ahead of Jurchen vanguard troops . After a coup in Hangzhou almost <unk> him , in May 1129 he moved his capital back north to Jiankang ( modern @-@ day <unk> ) on the south bank of the Yangtze . One month later , however , Zong Ze 's successor Du Chong ( <unk> ) vacated his forces from Kaifeng , exposing Jiankang to attack . The emperor moved back to Hangzhou in September , leaving Jiankang in Du Chong 's hands . The Jin eventually captured Kaifeng in early 1130 . 
