1. Open the Cool Dog Music app, log in to your account, and search for the song you want to download.
2. Click the song to enter the song details page, and click the "Download" button on the right side of the song.
3. Click OK to download the song.
4. After downloading, click "Download Management" on the "My" page, find the downloaded song, and click the "Export" button on the right.
5. In the pop-up window, click "Save to local" to finish saving the song to local.