ㄙㄨˋㄒㄧㄥㄧㄝˋㄇㄟˋsùxīng‑yèmèi

夙兴夜寐
  1. 早起形容勤勞 考取研究所夙興夜寐努力讀書」。

to rise early and sleep late (idiom)​; to work hard, to study diligently, to burn the candle at both ends