Why is Shenzhen social security cheap?

Actually Shenzhen is a special city. Shenzhen is a relatively young city, with a small proportion of elderly people and almost no cost of providing for the aged. Therefore, pension funds are not as nervous as other cities. As we all know, among the five social insurance contributions, the pension insurance contribution rate is the highest, and Shenzhen's pension insurance contribution rate is lower than other cities, so the social insurance premium is naturally lower.