Why can't the down payment of Mianyang urban and rural residents' medical insurance be reimbursed during the half-year observation period?

Social security regulations. According to the inquiry of Mianyang Social Security Bureau in official website, the newly paid residents' medical insurance can be reimbursed for more than half a year, and the observation period is half a year, while the medical insurance paid by the unit can be reimbursed for hospitalization in the next month. Mianyang, known as Mianzhou in ancient times, is a prefecture-level city, a second-class big city and a provincial sub-central city under the jurisdiction of Sichuan Province.