The short message suggests that you may have had direct or indirect contact with infected people in COVID-19 recently, which needs further verification.
Taking Nanjing as an example, Chen Xuemei, deputy director of Nanjing Civil Affairs Bureau, said that citizens who received the text message should not be nervous. This only means that you may have had direct or indirect contact with infected people in COVID-19 in the near future and need further verification. Also pay attention. After receiving the SMS prompt, if the health code still shows the green code, please don't go out, report to your community immediately, and actively cooperate with the community to check the itinerary.