What does it mean that the accumulated monthly social security does not include inversion?

Excuse me, do you want to ask the question "excluding the cumulative number of months of social security paid in one lump sum"? It means that one-time payment is not included.

Wholesale payment is a proper term for one-time payment of social security, and the cumulative number of months of social security does not include wholesale payment or one-time payment.

One-time payment is a policy for some special groups. For example, some people have reached the legal retirement age, but the payment is less than 15 years, and a one-time supplement 15 years is adopted.