- 以备不测 yǐbèibùcè prepare for contingenciesto be prepared for accidents or unforeseen circumstances
- 天有不测风云,人有旦夕祸福 tiānyǒubùcèfēngyún, rényǒudànxīhuòfú unpredictabilityfortune as unpredictable as the weather, every day may bring fortune or calamity; something unexpected may happen at any moment
- 屡遭不测 lǚzāobùcè repeated mishapsbeset by a series of mishaps (idiom)