You are not allowed to merge social security over 40 years old

The above is about the conditions that social security cannot be merged:

According to the inquiry method, male employees over 50 years old cannot be merged, and female employees over 40 years old cannot be merged. Many cities pay social security, social security will not be automatically merged, and social security transfer procedures need to be handled before retirement. However, the average male employee is over 50 years old and the female employee is over 40 years old, so it is impossible to handle social security transfer procedures locally. Social security transfer function transfers pension insurance and medical insurance.

Men under the age of 50 and women under the age of 40 can apply for immediate processing. However, for men over 50 years old and women over 40 years old who want to move from their registered permanent residence to other places, the social security agency at the registered permanent residence can seal up their social security accounts, and the social security agency at the new workplace will help them set up temporary accounts. After reaching the statutory retirement age, the temporary social security relationship account will be transferred to the social security agency where the account is located. Those who have paid 15 years or more will go through the retirement examination and approval procedures according to the regulations and receive a monthly pension.

Legal basis: Interim Measures for the Transfer and Continuation of Basic Endowment Insurance for Employees in Urban Enterprises. Article 5 The transfer and connection of the basic old-age insurance relationship of the insured shall be handled in accordance with the following provisions:) If the insured returns to the domicile (referring to the province, autonomous region or municipality directly under the Central Government, the same below) for employment and insurance, the relevant social security agency in the domicile shall handle the transfer and connection formalities in time. If the insured fails to return to the place where the household registration is located for employment, the social security agency of the newly insured place shall handle the transfer and connection procedures in time. However, for men over 50 years of age and women over 40 years of age, the basic old-age insurance relationship should be maintained in the original insured place, and a temporary basic old-age insurance payment account should be established in the new insured place to record all the contributions of units and individuals. Thirdly, when the insured person is employed across provinces or reaches the conditions for receiving benefits in the newly insured place, all the payment principal and interest in the temporary basic old-age insurance payment account will be transferred to the original insured place or the place for receiving benefits. If the insured is transferred with the approval of the Organization Department of the Party Committee at or above the county level and the administrative department of human resources and social security, and establishes labor relations with the transferred unit and pays the basic old-age insurance premium, it is not subject to the above-mentioned age limit and should go through the formalities for the transfer and connection of the basic old-age insurance relationship in time at the transferred place.