水中捞月 (水中撈月) shuǐ zhōng lāo yuè

shuǐ zhōng lāo yuè set phrase to scoop the moon out of the water; a hopeless endeavor
Domain: Idiom 成语
Notes: (CC-CEDICT '水中撈月')

Contained in

• 水中捞月，空有欢喜(水中撈月，空有歡喜) the joy of fishing for the moon in the water is a real as emptiness