In Nanjing must apply for a residence permit to pay social security?

The objective basis of social insurance is the risk that exists in the field of labor, and the standard of insurance is the person of the worker;

The subject of social insurance is specific. It includes workers (including their relatives) and employers;

Social insurance is compulsory;

The purpose of social insurance is to maintain the reproduction of the labor force;

The insurance fund is derived from the contributions of employers and workers and financial support.

The scope of insurance is limited to workers, excluding other members of society. The scope of insurance content is limited to the various risks in the labor risk, excluding additional property, economic and other risks (some companies calculate the five insurance and one gold is not in accordance with the employee's actual salary, but in addition to set up a base for calculating the payment).