《辽史·本纪·卷二十九》
金人侦察得知，派兵前来攻袭，张无法回平州，便逃奔燕京。
金人谍知，举兵来袭，瑴不得归，奔燕。
The Jurchens found out about this through reconnaissance and sent troops to attack. Zhang was unable to return to Pingzhou and fled to Yanjing.