To ensure one's parents are warm in winter and cool in summer, symbolizing filial piety; also used to describe a place with pleasant temperature year-round.
小明从小就懂得孝顺父母，冬天为父母暖被，夏天为父母扇风，真是冬温夏凊的典范。
From a young age, Xiao Ming understood filial piety, warming his parents' bed in winter and fanning them in summer, truly exemplifying 'dong wen xia qing'.
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