If you don't apply for this local code, it will be monitored. The local code is only convenient for screening people who have been to that place. If there is no application, you can confirm whether you have arrived in the area through big data and other means.
Place code is a proprietary two-dimensional code generated by the health code platform for key places, which identifies the location, name and other information of the place. After the people scan the code, the health code platform will automatically record the relevant information entering the place, but this information will only be used for epidemic prevention and control. Travel code, also called big data travel card, is the location information obtained through the base station where the user's mobile phone is located. Users can query all the city information they have been to in the past 14 days through this service. If the city I have been to has a high-risk area, the trip code will be marked with an asterisk at the back of the city, and the remarks will remind me of the route, but the trip code will not be associated with health status.