Large medical insurance refers to the insurance that the insured reimburses the excess when the medical expenses incurred due to major diseases exceed the reimbursable part of the basic medical insurance pooling fund. Large medical insurance, like basic medical insurance, also has a certain proportion of compensation. Under normal circumstances, large medical insurance is paid by the employer according to 1% of the base payment of employees and retirees of the unit and individual employees. It is suggested that you take out a large amount of medical insurance while participating in the basic medical insurance, which can provide a supplementary role for the basic medical insurance and make up for the part that cannot be reimbursed.
Further reading: How to buy insurance, which is good, and teach you how to avoid these "pits" of insurance.