How to connect social security after leaving and joining?

Legal analysis: after an individual resigns, the unit will go through the formalities of stopping paying social security. After finding a new work unit, it is ok to continue to participate in social security in the new unit. If an individual doesn't find a new work unit or the new unit doesn't buy social security, and I want to continue to buy social security, then when going through the resignation formalities, I need to negotiate with the personnel department of the original unit to let the original unit continue to buy social security for myself at its own expense, and generally agree.

Legal basis: Article 50 of People's Republic of China (PRC) Labor Contract Law. The employing unit shall issue a certificate of dissolution or termination of the labor contract at the time of dissolution or termination, and go through the formalities for the transfer of files and social insurance relations for employees within 15 days. Laborers shall handle the work handover according to the agreement of both parties. If the employing unit should pay economic compensation to the workers in accordance with the relevant provisions of this law, it should pay it when the work handover is completed. The employing unit shall keep the text of the dissolved or terminated labor contract for at least two years for future reference.