白明黑夜 [－－－－]

Jyutping baak6 ming4 hak1 je6
Pinyin bái míng hēi yè

Definitions (Wiktionary)
  1. phrase, Jin, idiomatic
    day and night; round the clock
    (syn.) 無晝無暗, 暝拍日, 日以繼夜, 夜以繼日, 日以继夜, 无昼无暗, 暝甲日, 夜以继日