邮票是邮政部门发行的作为邮资的凭证,具有通信的使用价值,同时又是一种艺术品,有欣赏和收藏价值。具有收藏投资价值的集邮品有以下几类:首日封新邮票发行第一天,用特制信封(信封的左右部分印有与邮票内容相配合的图案及说明文字)贴上新邮票,用当天的邮戳盖销。它记录了发生日 Postage stamps issued by the postal department as a postage voucher, with the use of the value of communications, but also a work of art, there is appreciation and collection value. There are the following types of philatelic products that have the value of collections investment: The first day of the first day of the new stamp issue, new stamps are affixed with a special envelope (the left and right parts of the envelope are printed with illustrations and explanatory text matching the contents of the stamp) Lost sales. It records the date of occurrence