Baidu Yinyue (百度音乐) was once a popular online music streaming platform in China, providing users with music search, playback, and download services. However, it has since been replaced by Baidu Netdisk. If you're looking for a similar service today, you might want to consider other popular platforms like QQ Music, NetEase Cloud Music, or Kugou Music. These platforms offer extensive music libraries and various features such as song creation, sharing, and discovery. Please make sure to use these services legally and respect the copyright of the music content.