How does China Unicom play CRBT?

How to set the default playing order of ringtone and music box (ringtone box): 1. When the computer accesses the Wo Music website, click "Login" in the upper right corner of the page, enter the mobile phone number (e-mail address, other user names), password and verification code, click the account at the portrait office in the upper right corner of the page after successful login, and enter the interface of "User Center > Business Management"; 2. Select the ringtone single to be set in the "ringtone library" or "ringtone box", click "Set as default ringtone", and set the playing order of ringtone songs according to the instructions on the page. Ring back tone is a personalized ring back tone service launched by China Unicom. It is a service customized by the called party, which provides a pleasant piece of music or a greeting for the calling party to replace the ordinary ring back tone.