Screenshot to send, you just need to take a screenshot of the Sukang code and the trip code, in the album will be two screenshots together and save, and then sent to the nail group can be. Health code: health code is through the color, quickly identify a person whether contact with the patient, or whether the pathway epidemic more serious city, green code that is the normal two-dimensional code. Trip code: trip code is China's several communications companies through the data received by the cell phone, access to the location of the user, through the code data can be queried to my previous 14 days to all the cities, also known as "communications big data trip card"