Check the playback mode to see if the actual size of the music you downloaded is different, and the bit rate is different. Audio and video files spliced ??by non-professional software will display different durations. It is also possible that you do not have a membership and can only download non-professional files. Full version.
You can try to open the membership service and download it again, or you can go to other platforms to download the original song to see if the resources of the Tangdou APP itself are incomplete. If the download of the song on other platforms is complete, That's the problem with the jelly beans themselves.
Nowadays, many songs are copyrighted, so you need to activate membership rights before you can download them. Otherwise, you can only listen to or download incomplete song versions. It is recommended that you check them one by one according to the above.