笔者任秘书多年,在公务活动中,曾多次收到过空信封,也就是里面什么也没有的空函。而这些空函又都是上级机关寄出的。说实话,当我第一次收到空函,拆开信封,发现里面空无一物的一刹那,是感到十分蹊跷和突然的。但我马上就意识到是怎么一回事了,于是抿嘴一笑,当即给发文机关去电话 I served as Secretary for many years, in official activities, has received many empty envelopes, that is, there is nothing empty letter. And these empty letters are sent by the higher authorities. To be honest, when I first received an empty letter, opened the envelope and found nothing inside the moment, is very strange and sudden. But I immediately realized that is one thing, then pouting, immediately sent a letter to the authority