Is it accurate for China Unicom to prompt mixed management to become a full member?

The "nucleic acid mixing tube" is a multi-person mixed detection, that is, nucleic acid detection is carried out on swab samples of many people at the same time. "Abnormal mixed tube" is not necessarily a confirmed case or asymptomatic infected person, but may also be positive, false positive or unqualified specimen. If COVID-19 is infected, the presence of related virus in the infected person can make the nucleic acid result positive. However, the mixed tube result is positive, which only means that at least 1 person in the mixed tube is positive, but it is not sure who and how many.