What does it mean to have a sense of security? When parents are old, what should they rely on to provide for the elderly?

A sense of security for the elderly is a state in which a person can rely on when he is old, which is similar to the state of raising children to prevent old age. A sense of security for the old and a sense of security for the young is not only a symbol of ancient prosperity, but also an ancient yearning for a harmonious society. In ancient times, old people were mainly raised by their children when they were old (so there is a saying that raising children to prevent old age). In modern society, there is a sense of supporting the elderly, and you can rely more on it when you are old. In addition to the support of children, there are a series of policies such as endowment insurance, nursing homes, nursing homes, and social security. Welfare can be relied on, which is a major manifestation of social progress and the welfare of the elderly (compared with ancient times).