《元史·列传·卷七十三》
张桢在给扩廓帖木儿的复信中，详细陈述和分析了当前国家形势，提出保君父、保社稷、保人民的希望。
今九重在上者如寄，青宫在下者如寄，生民之忧，国家之忧也，可不深思而熟计之哉！ 
Zhang Zhen, in his reply to Kuokuo Temür, elaborated and analyzed the current national situation and expressed his hope of protecting the emperor, the community, and the people.