天有不测风云

tiān yǒu bù cè fēng yún fortune as unpredictable as the weather (idiom); sth unexpected may happen at any moment

， 人

rén man; person; people; CL:個|个[ge4],位[wei4]

有

yǒu to have; there is; there are; to exist; to be

旦

dàn dawn; morning; daybreak; day; dan, female roles in Chinese opera (traditionally played by specialized male actors)

夕

xī dusk; evening; Taiwan pr. [xi4]

祸福

huò fú disaster and happiness