How long does it take to pass through high-risk areas?

Under normal circumstances, the mobile phone passes through a place and stays for about an hour, and there will be a track display.

"Communication Big Data Travel Card" is a travel card inquiry service jointly launched by China Telecom, China Mobile, China Unicom and China Information and Communication Research Institute. Provide users with free certificates of countries (regions) and domestic cities visited in the past 14 days.

The user's number can be used to evaluate whether the close contact population appears in high-risk areas, and also to evaluate the user's location and how far it is from the nearest epidemic community. In addition to telecom mobile phone users, mobile phone users and Unicom mobile phone users can also query personal activity tracks.

The three major telecom operators all said that roaming information only provides information about passing cities, and does not provide accurate location and stay time. This business is a public service, and the query results are for reference only, not as the final judgment basis.