Can Guangdong Fangsheng Human Resources Zhongshan Branch repay last month's social security?

Yes, you can. You can still pay back after the social security is cut off. Not all social security can be paid back after the payment is cut off. Under normal circumstances, social insurance premiums can only be paid in the last three months. Social security payment means that social security is not paid normally for several months for some reason, and then the social security for these months is paid back.