According to the relevant regulations of Beijing, the basic medical insurance for urban employees means that employees (before retirement age) can enjoy the current treatment, but retirees can enjoy medical security treatment without paying fees after 25 years of retirement. Supplementary medical insurance for serious illness in Beijing is a benefit paid in the current period, and retirement is also required, but it is rare. Whether it is urban residents' medical insurance or the new rural cooperative medical system, it is the current income of the current payment, and it is still necessary to pay at the retirement age.
Further reading: How to buy insurance, which is good, and teach you how to avoid these "pits" of insurance.