宵旰忧劳
    Pinyin: xiāo gàn yōu láo

    Explanation: 宵衣旰食，非常劳苦。形容勤于政事。亦作宵旰焦劳”、宵旰忧勤”。

    Source: 《明史·吴时来传》若不去嵩父子，陛下虽宵旰忧劳，边事终不可为也。”

  • Thesaurus:  Labor incessantly on duty Coke workers