How to write the track of students' health code turning yellow?

Fill in according to the actual situation. Isolate students immediately after discovering that their travel itinerary codes are programmed in yellow. Before the survey, students were asked where they had been before they came to school. Just fill in the answers truthfully, so fill them in according to the actual situation. Health Code is a tracking and judging system of personal health information and activity information used for epidemic prevention and control in COVID-19. Individuals declare online by themselves, and generate personal two-dimensional code after background audit, which can be used as an electronic certificate for individuals to enter and leave a certain area, realizing one-time declaration and local use.