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Jyutping jyu4 jung5 ho2 gu2
Pinyin yú yǒng kě gǔ

Definitions (CC-CEDICT)
  1. lit. spare valor for sale (idiom); fig. after former successes, still ready for more work
  2. not resting on one's laurels
Definitions (Wiktionary)
  1. phrase, idiomatic
    to be exceedingly valorous; to have extraordinary courage
  2. phrase, idiomatic
    to be ready for more challenges; to be untiring for further exploits