1. Those who hide information in high-risk areas are actually detected by people in the community and returned to high-risk areas.
2. The phone is turned off or there is no signal for too long.
3. Failing to report to relevant local units in time when going to high-risk areas.
4. It is also possible that the current network is not good, the mobile phone is turned off and restarted, and the applet is turned off and reloaded.