How to set the default playback order of ringtones and music boxes (ringtone boxes): 1. Visit the Wo Music website on your computer, click "Login" in the upper right corner of the page, and enter your mobile phone number (email, other user name) ), password, and verification code. After successfully logging in, click the account at the small portrait in the upper right corner of the page to enter the "User Center > Business Management" interface; 2. Select the settings you need in "Ring Library" or "Ring Tone Box" For the ringtone single, click "Set as Default Ringtone" and follow the page prompts to set the playback order of the ringtone songs. Xuanling is a personalized ringback tone service launched by China Unicom. It is a service that is customized by the called user and provides the calling user with a piece of pleasant music or a greeting to replace the ordinary ringback tone.