平信 [－－]

Jyutping ping4 seon3
Pinyin píng xìn

Definitions (CC-CEDICT)
  1. ordinary mail (as opposed to air mail etc)
Definitions (Wiktionary)
  1. noun
    ordinary mail
  2. noun
    surface mail
Definitions (Kaifangcidian)
  1. （沒有對應漢語詞彙）