Went to zhangjiagang, and then came back. Why did the epidemic prevention and control department call?

This is normal. During the epidemic, many people received calls from the epidemic prevention and control center in order to check the secret contacts. As long as you have been to a high-risk area and then returned to your place of residence or other places, big data will be fed back to the government, but only the places and telephone numbers you have been to are big data, and then the social security office will send someone to call you to ask about your situation.

Under normal circumstances, you will only be asked to provide information such as your ID number and specific place of residence when you control or call the staff's jurisdiction. In fact, if you don't trust yourself, you should report it to the community. You have to do nucleic acid, and you have to isolate it at home.