Click on the picture of the national quarantine policy inquiry system on the homepage of the local treasure APP to inquire about the specific requirements of the national quarantine policy for returning home during the Spring Festival, or search for the epidemic situation on the homepage of the local treasure APP to obtain the latest news of epidemic prevention in travel itinerary, the national epidemic risk level inquiry portal, the vaccination clinic and appointment in COVID-19, the new nucleic acid testing appointment method+price+institution+result inquiry portal, and the application strategy and usage with application code.