How does Unicom judge whether it has close ties with COVID-19?

You can find it by logging in to WeChat through Unicom card, and then log in to a platform.

How to find out if you are secretly connected: You can find the "self-examination of peers who are secretly connected" in the WeChat search "National Government Service Platform" applet. At the same time, you can also enter "peer self-examination" in the Alipay search bar, and check with one click whether you are a "close contact" and whether you have taken public transport with a confirmed or suspected patient within 14 days.