1. The collection department of the medical insurance institution shall establish arrears data information according to the arrears of medical insurance, fill in the Notice on Payment of Social Insurance Premium, and notify the insured unit to pay the arrears. 2. Due to financing difficulties, it is impossible to pay off the arrears of the insured unit in full in one lump sum, and the collection department of the medical insurance institution shall sign a social insurance payment agreement with it. If the arrears unit is merged or divided. ...

Further reading: How to buy insurance, which is good, and teach you how to avoid these "pits" of insurance.