Communication big data travel card journey track query interface for the whole country to provide query services, peak hours may be due to a large number of users caused by network congestion, we recommend that you can try to query again in the middle of the day, evening and other hours.

Declaration of the national government service platform trip: click on the "view my health code" or "national health code small program", enter the personal epidemic health information query interface, to the editor's area Langfang as an example, click on the immediate view, enter the My health information.