The most important part of health code is mobile phone location based on mobile phone number, consumption record, travel and plane record based on ID number, filling in travel information or scanning scene location registration, etc. , and combined with the epidemic situation, big data analysis shows the results.
All kinds of health codes are basically docked "communication big data travel cards", which are not restricted by regions and do not collect ID numbers and home addresses. As long as you enter the mobile phone number, you can get the travel information of the past 14 days according to the communication network data. The principle is that the location of the user's mobile phone can be effectively located based on the mobile phone signaling data, so as to find the owner himself.