We use base station data for our big data travel card service, and the signals from the two base stations at the junction of the administrative divisions may cross-cover the communication and sometimes cover the blind spot where the health treasure can't be found when you type in Hebei Province.

Beijing "health treasure" small program is a convenient personal query of their own epidemic prevention related health status of the small tool, you can through WeChat, Alipay, search for "Beijing health treasure" small program, query their own health status. The results can be used as a reference for your health status when you return to work or enter or leave a public ****ing place.