Nucleic acid testing services can be provided to groups and asymptomatic individuals, and outpatient clinics need to make an appointment. Individuals can enter the "Beijing anzhen hospital-General Medicine-Nucleic Acid Screening Clinic" through the official account of Beijing Medical Communication WeChat or self-service machine to make an appointment, and the number source can be reserved within seven days. Come to the hospital at the suggested time so as not to affect the specimen collection. On the day of the visit, the number will be picked up from the hospital self-service machine, and the patient will go to the general clinic on the north side of the tenth floor of the outpatient building according to the number. After the patient fills in the Notice of Health Management after Sampling in the nucleic acid screening clinic, the doctor will issue an examination application form.