How can Beijing units compensate for not paying social security?

First, you can ask the company to make it up. I suggest you consult with the company first. If the negotiation fails, you should make other plans:

First, keep relevant evidence to prove the existence of labor relations. For example, the employment notice /offer sent to you by the company, the signed labor contract, the wage payment voucher/record, the work permit/brand, the attendance record and the testimony of colleagues must be found in 92 years, so that the earliest working years can be defined more easily.

2. If the materials required in Article 1 are fully prepared and the negotiation with the company is fruitless, you can file a labor arbitration with the labor inspection department or the labor arbitration department, or suggest that you directly file a lawsuit with the local people's court, provide materials to prove the labor relationship, and ask the employer to pay social security. And demand economic compensation.