After working for two years, I went to study for a doctor. After graduation, I went to a new unit. Is social security affected?

After working for two years, I went to study for a PhD. After graduation, I went to a new unit and my social security was affected. Engaged in full-time doctoral studies and joining a new unit after obtaining a degree should be regarded as re-employment. In this case, it may be necessary to re-apply for social security procedures. The new unit may have its own social security regulations, requiring employees to participate in specific social security plans. Therefore, after working for two years, I went to study for a Ph.D. and went to a new unit after graduation, and social security was affected. Social security, that is, social insurance, refers to the income or compensation guarantee provided for those who are unable to work, temporarily unemployed or suffer losses due to health reasons. The main items of social security include endowment insurance, maternity insurance, unemployment insurance, medical insurance and industrial injury insurance.