袁娅维TIA RAY, 刘宇's ' "明日来信" was released on its scheduled release date, May 4, 2022. With this song being around four minutes long, at 4:09, the duration of this song is pretty average compared to other songs. This track is safe for children and doesn't appear to contain any foul language, since the "Explicit" tag was not present in this track. There is only one song in 明日来信（青年音乐文化发展计划·五四合辑）, so we believe that "明日来信" is a single. In terms of popularity, 明日来信 is currently unknown. The overall tone is very danceable, especially with its high energy, which produces more of a euphoric, cheerful, or happy vibe.
The tempo marking of 明日来信 by 袁娅维TIA RAY, 刘宇 is Moderato (at a moderate speed), since this song has a tempo of 110 BPM. With that information, we can conclude that the song has a moderate tempo. The time signature for this track is 4/4.
G Major is the music key of this track. This also means that this song has a camelot key of 9B. So, the perfect camelot match for 9B would be either 9B or 10A. While, 10B can give you a low energy boost. For moderate energy boost, you would use 6B and a high energy boost can either be 11B or 4B. Though, if you want a low energy drop, you should looking for songs with either a camelot key of 9A or 8B will give you a low energy drop, 12B would be a moderate one, and 7B or 2B would be a high energy drop. Lastly, 6A allows you to change the mood.
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