[All] Personally, when I think of the sun, the collaboration stage comes to mind

Rather than calling it a collaboration, it would be more accurate to say that it was a stage featuring Taeyang. Back when Epik High's Tablo and Taeyang were under YG Entertainment, Tablo released his first solo album, and Taeyang was featured in the title song of Part 2 of "Fever's End", "Tomorrow", and they even performed together on stage.