Nature, Published online: 03 March 2026; doi:10.1038/d41586-026-00597-7
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（作者为三峡植物园林业技术推广站站长，本报记者吴君采访整理）
Babies are beautiful. I always want to smile at them in the street, perhaps because they are a rarer and more precious sight in this ageing country or because they remind me of my grandchildren. There are about 3.5 million children aged four and under, while dogs on the streets are a more plentiful 13.5 million. Is the dog boom compensating for fewer children? As time goes by, there are going to be ever more grandparents and ever fewer children to beam at foolishly.