一纸空文
一纸空文一纸空文[yī zhǐ kōng wén]1.■a mere scrap of paper; a bit of waste paper; (just) a useless scrap of paper; empty phrases on a scrap of waste paper; empty words on a sheet of paper; in a mere sheet of document; remain a dead letter:这个协定如不执行只不过是一纸空文。This agreement, if not implemented, is a mere scrap of paper.
