Click on "Epidemic Prevention and Control Information" in the lower right corner of the Alipay Health Code interface, select "Apply for Transfer Code" in the pop-up menu, fill in the basic personal information as required, and indicate the start and end time of the home medical observation, and upload the information of negative nucleic acid test in the interval of one hour and the screenshot of the personal travel code. Fill in the basic personal information as required, indicating the start and end time of home medical observation, and upload the negative information of nucleic acid test at an interval of 48 hours, as well as the screenshot of the individual's travel code. The county (district) command data task force will review the application and immediately transfer the code if it meets the conditions of the transfer code.