Trip code, nucleic acid report. By June 29th, 2022, Xi 'an had arrived at the exit of Ankang East Expressway, and it was necessary to check run-length encoding and nucleic acid report one by one. People who travel to Xi 'an will get a red epidemic prevention sign and stick it on the windshield. The staff will guide the car to the side of the road and fill out the return safety report. After filling it out, they will queue up for verification, send out nucleic acid test cards and arrange free nucleic acids on the spot, and one person will be responsible. Send a note with a nucleic acid report after you finish, and then publish it after you stamp it.