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Jyutping tou3 zau2 wu1 fei1
Pinyin tù zǒu wū fēi

Definitions (Wiktionary)
  1. phrase, idiomatic
    time passes quickly
    (syn.) 烏飛兔走, 乌飞兔走
Examples (Wiktionary)
  1. Mandarin
    兔走乌飞
    兔走烏飛
    tù zǒu wū fēi
    • time passes quickly (literally, “the rabbit [of the moon] runs and the crow [of the sun] flies”)