Health centers call to verify personal information, generally to supplement the personal information of residents in their jurisdiction. Basically, they will notify in advance in the neighborhood or property. This situation will not be very common. If you feel suspicious, you can first ask if anyone in the local hospital has called you, or you can go to the health center to work by yourself.
Health centers are comprehensive health management and medical prevention institutions established in counties or towns. Its task is to be responsible for local medical and health work, organize and lead mass health campaigns, train health technicians, and provide operational guidance and consultation to primary medical and health institutions.