You should be talking about the urban residents' medical insurance card, which is paid annually. You can use it for one year, but you can't use it without paying. If you have already done it in a primary school, you don't need to apply again now. You only need to bring your valid ID card to your school or local neighborhood committee to pay the insurance from July to September each year (student 30 yuan/year, 18 or below 30 yuan/year, 18+020/ year).