How to restore an OPPO phone after canceling Bluetooth pairing?

After the OPPO phone cancels the Bluetooth pairing, it needs to be paired again to restore the Bluetooth connection.

How to use Bluetooth:

Two Bluetooth devices turn on Bluetooth respectively, establish a connection, click on the file to be transmitted-long press-share icon-Bluetooth-and select the connected Bluetooth device for transmission.

Note: Bluetooth pairing is not needed between new models now.