This sentence emphasizes the respect and care for the elders and the younger generation. It reminds people not only to respect their parents and elders, but also to treat other people's parents like their elders. At the same time, we should care about young people as much as our own children and give them care and help.
This sentence conveys a concept of family ethics and social ethics, emphasizes the importance of respecting the old and loving the young, and embodies the importance of family and social relations in China culture.