The following precautions should be noted when performing nucleic acid testing: 1. Avoid eating within 2 hours before sampling and avoid smoking and drinking within half an hour; 2. Before leaving home, carry a good ID card, wear a mask correctly and take a spare mask with you; 3. Wear the mask correctly throughout the process, keep a safe distance of 1 meter when queuing, queue up in a civilized manner, don’t talk and don’t bunch up. 4. Do not touch the items on the sampling table during the sampling process to avoid contact with pollutants and infection. 5. After sampling is completed, if your throat is uncomfortable, do not spit anywhere. Throw the discarded mask into the designated medical trash can, put on a spare mask, and then leave the sampling point. 6. Leave immediately after sampling and go home to wash your hands carefully with soap or hand sanitizer.