1. You can inquire through the official account of "Qingcheng Medical" WeChat.
2. When inquiring, log in to the official account of Qingcheng Medical WeChat, click "Personal Center" and enter "Large-scale nucleic acid inquiry 1" or "Large-scale nucleic acid inquiry 2" to inquire about COVID-19 vouchers.
3. You can query the results of large-scale nucleic acid detection, and enter the "nucleic acid query of medical institutions" to query the results of single-tube nucleic acid collection conducted by citizens through medical institutions.