笔者在整理邮品时意外发现4枚奇怪的信件,仔细审视发现,这4枚封很少见、很有特点,现展示给大家共同探讨。1.信件没有贴邮票或其他付费戳记,但右上角都有手写的9克、10克的信函重量和7.2元、4.2元的邮资金额(图1、图2)。2.所盖日戳都是“新疆·石河子”双文字机要日戳,其中一枚的日期是1997年7月8日,其它三枚的日期是1996年5月7日。另外,这4枚封都不是机要信件,为什么会盖机要日 The author found four strange letters unexpectedly in the collation of postal products, a closer examination found that these four envelopes are rare and very distinctive, are now displayed for everyone to discuss. 1. The letter does not have stamps or other paid stamps, but the right hand corner has 9 grams of handwritten, 10 gram letter weight and 7.2 yuan, 4.2 yuan postage amount (Figure 1, Figure 2). 2. Cover date stamps are “Xinjiang Shihezi ” double-text confidential date stamp, one of the date is July 8, 1997, the other three of the date is May 7, 1996. In addition, these four letters are not confidential letters, why cover the confidential date