After installation, please open the "Health" APP, click the "Add Device" card on the "Devices" page or the scan icon in the upper right corner to enter the code scanning interface. Scan the QR code displayed on the bracelet, and then follow the instructions in the APP to complete the pairing with the bracelet.
If it is not the first time to use the bracelet, after the bracelet is charged and turned on, slide the bracelet screen to enter Settings >; Regarding the bracelet, through the code scanning function of the mobile phone "Health" APP device interface, find the matching QR code and scan the connection.
This answer applies to all OPPO models.