You can't have a social security record when you study for a PhD, can you?

There is no conflict between reading a blog and social security records, and reading a blog can also have social security records.

Social security refers to a social and economic system that provides income or compensation for people who have lost their ability to work, are temporarily unemployed or suffer losses due to health reasons. The main items of social insurance include endowment insurance, medical insurance, unemployment insurance, industrial injury insurance and maternity insurance. This has nothing to do with studying for a doctorate.

However, if you pay social security, you are not a fresh graduate.