Philanthropists in the old days used to build roads and bridges, but the popular trend nowadays is to preserve and maintain what's there by adopting it, a practice that got started with the relocation of the Taipei City Zoo.
古時士紳大發善心，常為鄉里造橋鋪路，現在卻流行認養；前者「創業」，後者「守成」。而認養風氣的由來，還得由台北動物園搬家說起。