Social security can not buy old-age insurance.

Legal analysis: Old-age insurance: the unit contribution ratio is 12%, and the individual contribution ratio is 8%.

Medical insurance: 8% for units and 2% for individuals.

Unemployment insurance: the unit pays 1.5%, and the individual pays 0.5%.

Industrial injury insurance: the unit pays 0.5%, and the individual does not have to pay.

Maternity insurance: the unit pays 0.85%, and the individual does not have to pay.

Legal basis: People's Republic of China (PRC) Social Insurance Law.

Article 4 Employers and individuals in People's Republic of China (PRC) shall pay social insurance premiums according to law, and have the right to inquire about payment records and personal rights and interests records, and ask social insurance agencies to provide social insurance consultation and other related services.

Individuals enjoy social insurance benefits according to law and have the right to supervise the payment of their own units.

Fifth people's governments at or above the county level shall incorporate social insurance into the national economic and social development plan.

The state raises social insurance funds through multiple channels. People's governments at or above the county level shall give necessary financial support to social insurance.

The state supports social insurance through preferential tax policies.