一纸空文

一紙空文
yīzhǐkōngwén
a worthless piece of paper (idiom)

CEDICT

a worthless piece of paper

Wiktionary

徒具文字而无实际效用的规章、计画等文书。

重編國語辭典

徒具文字而无实际效用的规章、计画等文书。

維基詞典

Entry Composition

1 一 yī
  1. one
  2. single
  3. a (article)
  4. as soon as
  5. entire; whole; all; throughout
  6. "one" radical in Chinese characters (Kangxi radical 1)
  7. also pr. yāo for greater clarity when spelling out numbers digit by digit
=2 纸 zhǐ variant of 纸 zhǐ
=2 纸 zhǐ classifier for documents, letters etc

classifiers: 張, 沓
3 空文 kōngwén
  1. article devoid of substance or practicality
  2. dead letter; mere scrap of paper; ineffective law or regulation