Social security has been paid for 10 years in one place and 5 years in another city. Can you add them together?

Hello, social security has been paid in one place for 10 years and in another city for 5 years, so it can be combined and added together.

Process of social security merger in different places: Step 1: Before the insured moves across provinces, the social security agency of the original insured place will issue the payment certificate of basic old-age insurance. Step 2: The insured person holds the payment voucher, registered permanent residence and ID card to handle the continuation relationship with the social security agency in the new place of employment. Step 3: The social security agency of the new employment place will review whether the applicant meets the requirements within 15 working days. Step 4: Within 15 working days after receiving the contact letter, the social security agency of the original insured place will clear up whether the applicant's insurance payment is in arrears and handle the transfer of the old-age insurance fund, terminate the applicant's local insurance relationship, and issue the basic old-age insurance relationship transfer and connection information form to the new insured place. The last step: the social security institution of the newly insured place shall complete the relevant procedures within 15 working days after receiving the information form and the transfer fund.