“Under a Vast Sky” (????), has become the unofficial anthem for Hong Kong’s pro-democracy protests, Occupy Central Hong Kong, also called the #UmbrellaMovement or the #UmbrellaRevolution for the umbrellas used by protesters to ward off pepper spray as well as rain.

The song is a monster ballad, a 1993 hit from the Hong Kong rock band Beyond, written by the band’s lead vocalist and guitarist, Wong Ka-kui, who died that year. Like many of Beyond’s song’s, “Under a Vast Sky” carries a strong political message, originally intended to blast the vacuousness of the Hong Kong music industry in the early 90’s, the lyrics have been repurposed as a rallying cry for the protests over China’s limiting of political reform in Hong Kong.

Protesters describe the anthem as a song of hope and a way to bolster their spirits during the long Occupation of Hong Kong’s Central area. Anti-apartheid protesters in South Africa and civil rights marchers in the United States often described their songs in the same way, as ways to bolster hope and also to help summon the courage necessary to face police dogs and firehoses.

“Under a Vast Sky” is reportedly being sung by the crowd in Hong Kong’s Central district up to 10 times a day, along with other songs such as “Do You Hear The People Sing” from Les Misérables.