Zhang Bichen's '曾经守候' came out on December 29, 2016. With this song being around four minutes long, at 4:21, 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 曾经守候, so we believe that this song is a single. 曾经守候 is not that popular right now. Although the tone can be danceable to some, this track does projects more of a negative sound rather than a postive one.
The tempo marking of 曾经守候 by Zhang Bichen is Andante (at a walking pace), since this song has a tempo of 78 テンポ. With that information, we can conclude that the song has a slow tempo. The time signature for this track is 4/4.
The music key of this track is G Major. 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.