宵衣旰食 [－－－－]

Jyutping siu1 ji1 gon3 sik6
Pinyin xiāo yī gàn shí

Definitions (CC-CEDICT)
  1. to dress before light and not eat before dark (idiom)
  2. diligently attending to official matters
Definitions (Wiktionary)
  1. phrase, idiomatic
    Very hard-working.