Turn on Bluetooth and synchronize the mi band.
Click "in the upper right corner. . . "。
The drop-down list appears, and select "Service".
Go to the "Services" page and select "Bind QQ".
Enter the page of "Binding Mobile QQ" and select "Binding QQ Health".
Login to QQ, authorize and bind QQ. After binding, you will return to the service page in step 3.
Click "bind QQ" again on the "service" page, and you can see the QQ bound this time.