How to shield Huawei's anti-loss equipment from receiving signals?

According to the query of Baidu Library, the methods of shielding Huawei's anti-loss equipment from receiving signals are as follows:

1. Turn off Huawei's anti-loss equipment and take out the calling card.

2. Open the back shell of the watch and take out the battery.

3. Hang the antenna of the watch and anti-loss device and keep it vertical to the ground.

4. The shielding bag for Huawei's anti-loss equipment is completely sealed, and the signal reception is completely shielded.

The electronic anti-lost device, that is, the electronic positioning terminal, can accurately query the vehicle position and has the function of multi-day trajectory playback.