Seeing the young and old of the mountain village all content and happy, tourists couldn't help snapping photos.
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history
From 《桃花源记》 by 陶渊明 (Tao Yuanming, Eastern Jin): '黄发垂髫,并怡然自乐。' The 黄发 (elderly) and 垂髫 (children) of Peach Blossom Spring live in mutual peace — Tao's utopia.
usage
并 here = 'all together,' classical sense. 怡然 = serene contentment (still used today: 怡然自得).