tiān yǒu bù cè fēng yún
fortune as unpredictable as the weather (idiom); sth unexpected may happen at any moment
tiān yǒu bù cè fēng yún , rén yǒu dàn xī huò fú
fortune as unpredictable as the weather, every day may bring fortune or calamity (idiom); sth unexpected may happen at any moment