《宋史·列传·卷七十二》
在乐寿驻扎，对副使张茂实说： 我作为使者而不看国书，假如国书言词与口传之词不同，我的事情就失败了。 打开国书看果然与口传之词不同，立即骑马回到京师，在晚上请求觐见，改换国书才前行。
行次乐寿，谓副使张茂实曰： 吾为使者而不见国书，脱书词与口传异，吾事败矣。 启视果不同，即驰还都，以晡时入见，易书而行。
When he stopped over in Leshou, he told his deputy Zhang Maoshi: I’m an envoy but I haven’t seen the state document. If the document says something different from the verbal message, my mission will have failed. He opened the state document, saw that it was indeed different from the verbal message, and galloped back to the imperial capital that night. He requested an audience with the emperor, changed the contents of the state document, and then set off again.