天安门是中华人民共和国的象征,以天安门图作为邮资图案的邮资信封是新中国邮政用品的重要组成部分,其发行年份为1956年至1982年。在长达26年的发行过程中,《天安门图》系列邮资信封共经历了3次改版,即:从普9型天安门图邮资信封(1956年7月—1965年)到毛主席语录邮资信封(1967年8月),到 Tiananmen Square is a symbol of the People’s Republic of China. The postal envelope with the Tiananmen Square figure as the postal pattern is an important part of the postal supplies for New China. The envelope was issued from 1956 to 1982. During the 26-year issuance process, the postage envelopes of the “Tiananmen Square” series have undergone three revisionings, ranging from the postal envelope of the Tiananmen Square No. 9 (July 1956 to 1965) to the postal mail envelope of Chairman Mao’s Quotations 1967 August), to