the poor southern Ruans and the rich northern Ruans—the wide gap between the rich and the poor families (of the same surname in a clan) ❍ 阮仲容 （咸）、步兵 （籍） 居道南，诸阮居道北，北阮富，南阮贫。(刘义庆《世说新语·任诞》)Ruan Xian and Ruan Ji lived on the south side of the street,and all the other Ruans lived on the north(sunnny) side. The northern Ruans were all wealthy,while the southern Ruans were poor.