What does it mean that the unit social security contribution is 0?

Legal analysis: From February to June, 2020, small and medium-sized enterprises' basic old-age insurance, unemployment insurance and industrial injury insurance (hereinafter referred to as the three social insurances) will be exempted from payment. From February to April 2020, the contributions of three social insurance units, including large enterprises and other insured units (excluding government agencies and institutions), will be halved.

Legal basis: Article 10 of the Social Insurance Law of People's Republic of China (PRC), employees shall participate in the basic old-age insurance, and the employer and employees shall jointly pay the basic old-age insurance premium. Individual industrial and commercial households without employees, part-time employees who have not participated in the basic old-age insurance in the employer and other flexible employees can participate in the basic old-age insurance, and individuals pay the basic old-age insurance premium. The measures for the endowment insurance of civil servants and staff managed by reference to the Civil Service Law shall be formulated by the State Council.