The health code will not change, the trip code will change. If you have not been to the infected area, then the health code will not change, because the trip? is the formation of the record, as long as out of the province will have a record, so it is changed, the health code is based on the actual real data, by the public or return to work back to work through their own online declaration, after the background audit, that is, generated belongs to the individual's two-dimensional code. Trip code, that is, communication big data trip card, is the ICT Institute joint telecommunications, mobile, Unicom, the use of communication big data for cell phone users to provide free query service.