How can I switch from metric to imperial or Celsius to Fahrenheit?

Please connect your watch with Amazfit APP and then go the the app > Profile > My devices Amazfit Bip >Weather settings > Temperature units to change between Celsius and Fahrenheit. After that, go back to the homes screen of the APP and pull down to sync manually.

Please connect your watch with Amazfit APP and then go the the app > Profile > Settings > Units > Set units for distance between Metric and Imperial. After that, go back to the homes screen of the APP and pull down to sync manually.