Parents don't have old-age social security.

It is illegal for no unit to ask other enterprises to let people take care of their employees to go to employee social security, and formal units will not accept it.

You can only find a regular social security company to pay five insurances for employees (although this method is not in line with the rules, there are many such companies in reality), but you also need to find a formal business license. Is that your own personal expenses will be more. Please consult the local company and ask how much a person has to pay at least one month. Anyway, at present, individuals in Beijing have to pay more than 1000 a month at least (even if you call an acquaintance to open a company, you will pay for it entirely by yourself, and you are not a family member of the employee, so it is impossible to give you the social security money that the unit should pay).

It seems that your parents should be farmers, and urban household registration should have a work unit. If so, farmers can participate in the rural social security pension and the new rural cooperative medical system in the village, with low payment but low treatment.

Of course, it depends on whether your parents are past retirement age.

The above is for reference only. Social security policies vary from place to place. Please consult the local social security department and related companies for details.

Further reading: How to buy insurance, which is good, and teach you how to avoid these "pits" of insurance.