The key error of communication big data line card mechanism and communication big data line card mechanism is often caused by server crash. It may be an anomaly caused by the increase in the number of visitors. When presenting the travel code, the communication big data travel card shows that the application service is abnormal and cannot be used.

Brief introduction of traffic big data travel card

Communication Big Data Travel Card is a free inquiry service for 654.38+06 billion mobile phone users nationwide, which is obtained by China Xintong Institute, China Telecom, China Mobile and China Unicom through the location of the base station where the user's mobile phone is located. Through this service, mobile phone users can query all the city information they have been to in the previous 654.38+04 days.

On March 30th, 20021year, the epidemic prevention health code of the national government service platform has been integrated, and the health code can display information related to big data travel cards, such as whether the user has been to medium and high-risk areas, so as to help the health code pass through one code.

The query result page will be marked with four colors: green, yellow, orange and red, and the rules will be adjusted in real time according to the actual situation. Red Card, data source of confirmed or suspected patients in COVID-19, Health and Wellness Commission, Orange Card, and close contacts of confirmed or suspected patients in COVID-19.