Does Liyang Social Security belong to Suzhou?

Don't belong. Both liyang city and Suzhou belong to Jiangsu Province, but liyang city and Suzhou are two different administrative divisions, and the location of social security depends on your work unit and domicile. According to the regulations, workers should participate in social insurance at their workplace or domicile. Those who work in liyang city can choose to participate in social insurance in liyang city. If you work in Suzhou, you can choose to participate in social insurance in Suzhou.