1.Run Google play store
2.Search Mi band
3.Install Mi Fit app
(I guess Xiaomi's fitness service's name is Mi Fit.)
4. Search Google fit
5. Install Google Fit app
[ Sync ]
1. Run Mi Fit app
2. Go to Accounts menu
3. Click Sync with Google Fit
4. Run Google Fit app
5. Go to Settings-> Connected app
6. Select Mi Fit
1. Run Mi Fit app
2. Go to Accounts menu
3. Click Sync with Google Fit
4. Run Google Fit app
5. Go to Settings-> Connected app
6. Select Mi Fit
I will add more screen shots later :)