《宋史·本纪·卷二十八》
张浚上奏说： 出使敌国是兵家的权宜之计，日后将开辟国境，恢复故土，最终会归于和好，不可立即断绝交往。 
张浚奏： 使事兵家机权，后将辟地复土，终归于和，未可遽绝。 
Zhang Jun wrote a memorial saying: Sending an envoy to an enemy state is an expedient measure of the military, and in the future, we will open up borders, restore our homeland and eventually reconcile, so we should not immediately cut off communication.