 <unk> one month after the Song had recovered Yanjing , Zhang <unk> ( <unk> ) , who had served as military governor of the Liao prefecture of <unk> about 200 kilometres ( 120 mi ) east of Yanjing , killed the main Jin official in that city and turned it over to the Song . The Jurchens defeated his armies a few months later and Zhang took refuge in Yanjing . Even though the Song agreed to execute him in late 1123 , this incident put tension between the two states , because the 1123 treaty had explicitly forbidden both sides from <unk> <unk> . In 1124 , Song officials further angered the Jin by asking for the <unk> of nine more border prefectures . The new Jin emperor Taizong ( r . 1123 – 1135 ) , Aguda 's brother and successor , hesitated , but warrior princes Wanyan Zonghan and Wanyan Zongwang ( <unk> ) vehemently refused to give them any more territory . Taizong eventually granted two prefectures , but by then the Jin leaders were ready to attack their southern neighbor . 
