郵簡 [邮简]

Jyutping jau4 gaan2
Pinyin yóu jiǎn

Definitions (CC-CEDICT)
  1. letter sheet (similar to an aerogram but not necessarily sent by airmail)
Definitions (CC-CANTO)
  1. an aerogram
Definitions (粵典–words.hk)
  1. 名詞
    一種​郵政產品​，​係​一張​寄信​紙​，​通常​已經​包括​郵費​，​寄信人​喺​郵​簡​上面​寫信​，​對​摺​後​封口​就​可以​寄出
    lettergram
Definitions (Wiktionary)
  1. noun
    letter sheet