Audio novel: What's the name of that sad song in the Warring States Period game?

I have verified that it is a "lone star solo", down the lonely valley and strolling through ancient times. Although they are all good songs that I have never heard before, I was shocked to hear this "Lone Star Solo" again after more than a dozen songs. This is the music that runs through all kinds of sad plots of Guiguzi in the Warring States Period.

In addition, there is also a song "Millennium Fenghua" which is also the keynote.