Is it useful to start buying social security at the age of 56

Is it useful for female employees to start buying social security at the age of 56? Hello! I'm happy to answer your question. If you can pay back the social security, you can buy it at the age of 56, but if you can't pay back the previous social security fees, it's useless. Because both urban and rural residents' social security and urban workers' social security need to pay at least 15 years before they can receive the corresponding pension after reaching retirement age.