The unit has been handed over to the social security center, but it doesn't show that it can be returned?

You can return it, but you should return it according to the situation. Social security is divided into individual payment part and unit payment part. Part of the unit payment goes directly into the overall account and cannot be refunded, while part of the individual payment goes into the individual account and can be refunded. Individuals can refund pensions and housing accumulation funds, and other insurances are not refundable.

Legal objectivity:

Article 86 of the Social Insurance Law, if an employer fails to pay social insurance premiums in full and on time, the social insurance premium collection agency shall order it to pay within a time limit or make up for it, and from the date of default, an overdue fine of 0.5% shall be added daily; Failing to pay within the time limit, the relevant administrative departments shall impose a fine of more than one time and less than three times the amount owed.