水中撈月

shuǐzhōnglāoyuè

fish for the moon—make impractical or vain efforts

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shui3 zhong1 lao1 yue4

to fetch the moon out of the sea (idiom); a hopeless illusion

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水中撈月|水中捞月 [shuǐ zhōng lāo yuè] ► to fetch the moon out of the sea (idiom); a hopeless illusion