饱经沧桑 bǎojīng-cāngsāng having lived through many changes

How to remember 饱经沧桑: 饱 full + 经 go through + 沧 azure + 桑 mulberry tree = having lived through many changes.

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Idiom: to have weathered life's vicissitudes - 一张饱经沧桑的脸 (yì zhāng bǎojīng cāngsāng de liǎn) a face worn by a lifetime of hardship.
Describes people (or things) that have lived through many changes and trials; 沧桑 = the mulberry-fields-to-sea of time.
Written register; conveys weariness and depth of experience.