Has the health code changed since Shanghai received big data to search for new coronary pneumonia SMS?

there will be no changes. Don't panic when you receive this message, just cooperate with the nucleic acid test. This short message suggests that according to Shanghai University's data survey, there may be a risk of direct or indirect contact with infected people in COVID-19 in the near future. Doesn't mean you are a close contact, a close contact, etc. So the health regulations will not change.