Only the most seriously ill patients were referred to the third and final tier, the county hospitals, which served 200,000 to 600,000 people each and were staffed by senior doctors who held degrees from 5-year medical schools.
只有最严重的患者需要转至最后一级也是第三级医疗机构县医院，覆盖200,000至600,000人，医师为五年制医学院毕业。