画大饼

畫大餅
huàdàbǐng

to make ambitious promises and not fulfill them

Wiktionary

Entry Composition

1 画 huà
  1. to draw; to paint
  2. to draw (a line) (variant of 划 huà)
  3. stroke of a Chinese character (variant of 划 huà)
  4. (calligraphy) horizontal stroke (variant of 划 huà)

classifiers: 幅, 張
2 大饼 dàbǐng large flat bread