Nanjing Jiangning District social security shows that it has been paid in real terms is that it has been withheld?

Social security has been paid in refers to the social security has actually been paid.

The concept of paid-in comes from company law. The paid-in system under the company law refers to the system whereby the registered capital of a company is clearly stipulated by law to be paid in full in order for the company to be incorporated. Financial companies, pawnbrokers, labor companies, joint-stock companies generally use the paid-in system.