Literally 'tuck hands in sleeves and watch from the side' - the image of someone deliberately keeping their hands hidden in their sleeves while others struggle.
Miànduì bù gōngzhèng de shì, bù yīnggāi xiùshǒu-pángguān.
In the face of injustice, one shouldn't be a bystander.
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history
This idiom dates back to the Song dynasty. In ancient Chinese clothing, wide sleeves could easily conceal tucked-in hands - a posture of deliberate inaction.
