My hukou is in Kunshan. How to handle social security in Kunshan?

Just go through all the procedures (ID card, household registration book, social security card) handled by the company when you leave your job (some places don't need it, anyway, individuals and units can handle it in one hall, and the company can find it when it stops), and go directly to the personal window of the Human Resources and Social Security Bureau (it varies from place to place, and some places will let you apply for a bank card, deposit the money and deduct it directly every month). As long as the procedures are neat, it should be done at one time.