Blue Daydreaming is a song created by Hedgehog, a band established in 2005. Yang says it was of the most talented but underrated bands in Beijing before the show began.

For him Hedgehog conveys "optimism alongside constant struggle" in its songs, the fruit of the group's own non-straight forward path in pursuing its dreams in rock music.

"Once you get what they want to say, you sort of develop a bond with the band, and that bond is not going to simply vanish. I can now see that my own experience and this music have something in common. I think the 'I' factor is always the most important part of the individual appraisal of every art form: 'I sympathize', 'I understand', 'I was cured', 'I was touched', 'I was inspired'. All have happened to me."