1. Install BYD and Huantai Health applications, and log in with the same account as the previous Android phone;
2. Huantai Health binds by scanning the watch device code (trying to manually connect failed many times);
3. BYD joined the NFC key, and the process was smooth;
4. At this time, the watch can still unlock the vehicle. The only difference is that Huantai Health has no car key display.