What does retirement mean? Is it very popular now?

Living and holding a group to support the elderly is indeed a very popular and practical way to support the elderly. Because young people are busy with work and children's education at present, many old people collectively buy houses and live in this livable city for a long time in order to reduce the burden on their children. Moreover, they have more similarities with the language and each has its own strengths. They can look after each other and help each other.