Resigned on the 20th, and the social security in Hangzhou was interrupted that month.

I left my job on the 20th, and the interruption time of social security in Hangzhou in that month was from 1 to 20th of the following month.

Leave the company in the current month and complete the declaration of downsizing before the 20th. The company and employees only need to bear the social security expenses of the current month. Resigned that month, and applied for downsizing from June/KLOC-0 to the 20th of the following month. Companies and employees are required to bear the social security expenses of the current month and the next month, and the Social Security Bureau can return the old-age insurance and unemployment insurance.