旦夕祸福
anyone may be lucky one moment and unlucky the next;fortune is fickle
人有~。People are subject to sudden changes of fortune;Misfortunes always befall a person suddenly.
旦夕祸福dàn xī huò fú
短时间内的灾祸和幸福。形容命运的突然改变。be in imminent peril, sudden changes of fortune, fortune is fickle