Medical * * * fund refers to the unified management of the state after collecting relevant premiums, in which medical reimbursement is based on the principle of * * * universal * * and * * * mutual aid. For example, A, B and C have all bought medical insurance, but not all of them will get sick. Maybe B will get sick this year, so the money paid by the three people will be reimbursed to B immediately. Therefore, this is called the so-called "medical assistance fund".