Do retired college students in Shanghai have to pay social security for one year in a row to settle down?

Don't. Official website shows that the Shanghai Municipal People's Government can directly apply for Shanghai household registration after retirement, without paying 1 year social security, for non-Shanghai college students who joined the army during their school years or graduation years, performed well during their service, and retired from active service as required. Social security, that is, social insurance, is 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.