The correct practice for New Crown Nucleic Acid is to collect pharyngeal swabs and nasopharyngeal swabs and place them in a preservation solution before testing. 1. Standard procedure for pharyngeal swab collection: the collected person’s head is slightly tilted, mouth open wide, exposing both sides of the pharynx and tonsils, for the pharyngeal exposure is not obvious, the tongue depressor is used to fully expose the pharynx and enhance the quality of specimen collection. Collectors use swab swabs to firstly wipe up and down and back and forth at both pharyngeal tonsils, at least 3 times, and then wipe up and down and back and forth at the posterior wall of the pharynx, also at least 3 times, and then immerse the head of the swab into the tube of virus preservation solution, discard the tail, and then tighten the cap of the tube. 2. Nasopharyngeal swab collection process: sampling personnel with one hand to support the head of the person to be sampled, the other hand holding the swab, along the close to the nostrils into the back of the slowly deep, not too hard, to avoid trauma bleeding. To be the tip of the swab to the nasopharyngeal cavity wall, and then gently rotate a week, such as reflexive coughing, need to stay for a moment, and then slowly take out the swab, the swab head immersed in the virus preservation solution in the tube, will be the end of the abandonment, and then tighten the tube cover. Of course, the new crown nucleic acid examination, in the clinic, there are deep sputum, anal swab, object surface nucleic acid collection, etc., according to different situations to choose different ways.