The method of connecting Dongfeng Citroen c4l to Bluetooth to play music is as follows: 1. Turn on both the mobile phone Bluetooth and the car Bluetooth and make them discoverable; 2. In the Bluetooth interface of the mobile phone, click "Search Device". Search for car Bluetooth; 3. Select the car Bluetooth displayed on the phone, click Car Bluetooth--Bluetooth Settings--Pairing. At this time, the phone will pop up a dialog box asking to enter the pairing code. Enter the pairing code (usually 1234 or 0000 or 1111) and click "Connect". At the same time, click "Pair" on the car Bluetooth interface, that is, the pairing is successful.