关于普一和改一的提前实寄封媒体上多有报道。仅《集邮》增刊第3期上发表的山东李秋实先生《用实寄封探究“普1”的发行》一文,即举证出销有1950年2月8日收发戳的普一800元票提前实寄封5枚,品种包括本埠平信、本埠挂号信、外埠平信、国际航空信四类。至于改一的提前实寄封,仅笔者的藏 There is a lot more coverage on the common media and the advanced media. Only published in the third issue of the “Philately” Supplement, Mr. Li Qiusheng, Shandong Province, “to explore the issue of general 1” issued by the real seal, that is, proof that the general one 800 yuan received on February 8, , Varieties include the port Ping letter, the registered port letter, the other port Ping letter, International Aviation letter four categories. As for the change of a real seal, only the author’s possession