A man went to the village post office to fetch a registered letter. The clerk refused to hand the letter over because he had no means of identification. The man took a photograph of himself from his pocket to show it to the clerk and said: "I think this might prove who I am." The clerk looked earnestly at the photograph for quite a while, and then said: "Yes, that's you, no mistake. Here's your letter." 有个人去村邮所去取一封挂号信，可是管理员不肯把信交给他，因为他没有身份证明。 他就从口袋里拿出一张自己的照片给管理员看，并对他说：“我想这个可以证明我是谁了吧。” 管理员把照片认真地看了好一会儿，然后说：“对的，是你，没错，把信拿去吧。”