Eastern Jin general who led an expedition north to win back the Central Plains. The idioms 闻鸡起舞 (rising at cockcrow to practise the sword) and 中流击楫 (striking the oar midstream) come from his life.
Zu Ti led an army on a northern expedition, vowing to recover the Central Plains.
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In 《晋书》 a cock crows at midnight, taken then as a bad omen; Zu Ti kicks his bedfellow 刘琨 awake, says 此非恶声也, 'that is no evil sound', and they rise to practise the sword. The 舞 in 闻鸡起舞 is sword play, not dancing.