“安南”在过去是指今天的越南、老挝及柬埔寨。“安南封”是指通过安南地区传递的信封。安南在20世纪初是法国的殖民地。“安南封”是怎样形成的?这得从那时的邮路说起。据《大清邮政光绪三十一年事务通报总论》(1905年)记载,当时云南邮政由三个部分组成:“蒙自总局所管各局(均隶云南、贵州两省)云南府、临安府、石屏州、蒿枝地、蛮耗、个旧厂、通海、蒙自、楚 “Annan” in the past refers to today’s Vietnam, Laos and Cambodia. “Annan envelope” refers to the envelopes passed through the Annan area. Annan was a French colony in the early 20th century. How did the “Annan Seal” come into being? According to the General Reply of Guangxu Post Guangxu Thirty-one Years (1905), Yunnan Post was composed of three parts: "All offices administered by Mengzi Administration (both in Yunnan and Guizhou provinces) Yunnan Province and Lin’an Prefecture , Stone screen state, Artemisia branches, pretty consumption, Gejiu factory, Tonghai, Mengzi, Chu