Chongerfei is very good. We originally used that one for class meetings. The English valder fields are also great. Happy Camp has also used it, and Bandari's Early Morning is also very good. Bandari has a lot of music suitable for a quiet environment

Groove Coverage's "Moonlight Shadow" is also good. The piano version is very comfortable as a background

You must have heard of "sercet garden" and Bach's "Song of the G String" is also very good< /p>

There are also some movie interludes that are also good. For example, the secret that cannot be told has a lot of great background music

As for songs with a faster tempo, "Too Young" by Chao Keqi is very good. , although it is sung, it can really stir up the atmosphere.

This is most of what I know. Hope it helps.