If I can't pay the social security of my new company, will I be fired?

You can return it, but you should return it according to the situation. Social security is divided into individual payment part and unit payment part. Part of the unit payment goes directly into the overall account and cannot be refunded, while part of the individual payment goes into the individual account and can be refunded. Individuals can refund pensions and housing accumulation funds, and other insurances are not refundable.

Legal objectivity:

Article 12 of the full text of the Social Insurance Law of People's Republic of China (PRC), the employing unit shall pay the basic old-age insurance premium in proportion to the total wages of its employees as stipulated by the state, and record it in the basic old-age insurance pooling fund. Employees shall pay the basic old-age insurance premium in accordance with the proportion of wages stipulated by the state and record it in their personal accounts. Individual industrial and commercial households without employees, part-time employees who have not participated in the basic old-age insurance in the employing unit and other flexible employees who have participated in the basic old-age insurance shall pay the basic old-age insurance premiums in accordance with state regulations and record them in the basic old-age insurance pooling fund and individual accounts respectively.