I think it was introduced online. Compared with ordinary commercial health insurance and high-end medical insurance that hospitals such as Hejia can use, it further relaxed the special needs and was completely out of the scope of social security. It also has incomparable advantages: first, it is not limited to designated hospitals, allowing high-end people to choose private and foreign hospitals that suit them or even go to foreign medical institutions for treatment. Second, it is not limited to medical services: for diseases such as AIDS, there will also be high-end medical security, and even the treatment expenses including organ transplantation can be reimbursed, so that the insured can enjoy the best medical services. Third, there is no longer a distinction between social security catalogues and non-social security catalogues: social security restrictions have been completely broken, and insured people do not need to consider the constraints of social security when seeking medical treatment; Fourth, direct compensation: direct compensation is different from advance payment (the traditional form of self-payment of medical expenses is called advance payment).
Further reading: How to buy insurance, which is good, and teach you how to avoid these "pits" of insurance.