Dear, there is only one bar in the balance of medical insurance account, which means that the balance of medical insurance card shows the bar symbol, which means that the balance of medical insurance card belongs to non-first-class social security card, or the balance is zero. Medical insurance refers to social medical insurance. Social medical insurance is a social insurance system established by the state and society according to certain laws and regulations to provide basic medical needs for workers within the scope of protection. The basic medical insurance premiums paid by individual employees are all included in individual accounts; The basic medical insurance premium paid by the employer is divided into two parts, one part is included in the personal account, and the other part is used to establish the overall fund. The basic medical insurance fund consists of overall funds and individual accounts. I hope my answer is helpful to you. Wish you a happy life!