Ask for a song (a sad song with a good rhythm, what instrument was played from beginning to end)

The same is true of The Day I Lost Love. There is also a cello in it.

So is "Deep Valley and Orchid"

You talk too much. There are many purring instruments. In China alone, there are many kinds. For example, in Ode to the Red Wall, Su Shi said that Dong Xiao's voice is "purring", as well as western musical instruments such as shakuhachi, cymbals, pipes and toots, and even the bass of cello.

These can be played with purring, and the rhythm is very good, and they are generally sad songs.

You'd better be more specific, such as what other instruments are there? What style? Does anyone sing? Where did you hear that? It's better to be specific, so that we can all be more clear.

I hope my answer can help you.