Children can apply on their behalf or cooperate with staff to register.

The communication big data itinerary card is obtained by the China Academy of Information and Communications Technology and three basic telecommunications companies, China Telecom, China Mobile and China Unicom, using mobile phone "signaling data" through the location of the base station where the user's mobile phone is located. A free query service provided by 1.6 billion mobile phone users across the country. Mobile phone users can use the service to query information about all the cities and towns they have visited in the past 14 days.

The query results show the visited provinces, cities (domestic), countries and regions (international), *** divided into three types of cards: green, yellow, and red. The rules will be adjusted in real time according to the actual situation.

The calculation of the user's itinerary in the previous 14 days was completed in the operator's backend, resulting in a one-day delay. For example, the calculation on March 5th was the itinerary data for the 14 days before March 4th (February 20th). -between March 4).

In addition, since the service uses base station data, in order to ensure continuous communication and achieve coverage without blind spots, the base station signals of the two places at the junction of administrative divisions may cross-cover, causing deviations in the results. They can be combined when used Other certificates shall be adjusted accordingly.

The query result page will be marked in four colors: green, yellow, orange, and red, and the rules will be adjusted in real time according to the actual situation.

The latest card rules:

Red card: confirmed or suspected patients with new coronary pneumonia (data source: National Health Commission).

Orange Card: Close contacts of confirmed or suspected patients with COVID-19.

Yellow card: 41 countries and regions: the United States, Spain, Italy, Germany, France, the United Kingdom, Iran, Turkey, Belgium, the Netherlands, Switzerland, Canada, Brazil, Russia, Portugal, Austria, Israel, South Korea, Sweden, Ireland, India, Ecuador, Australia.

Chile, Peru, Norway, Poland, Japan, Czech Republic, Denmark, Romania, Pakistan, Malaysia, Philippines, Saudi Arabia, Indonesia, Mexico, United Arab Emirates (United Arab Emirates), Nigeria, Thailand, Cambodia.