一紙空文 [－纸－－]

Jyutping jat1 zi2 hung1 man4
Pinyin yī zhǐ kōng wén

Definitions (CC-CEDICT)
  1. a worthless piece of paper (idiom)
Definitions (Wiktionary)
  1. phrase, idiomatic
    a worthless piece of paper
Definitions (Kaifangcidian)
  1. （沒有對應漢語詞彙）