Wu Qing-feng, also known as Greeny and credited as Wu Tsing-fong, is a Taiwanese singer-song writer, composer, arranger, and lyricist. Born in Taipei, he is a founding member and the lead vocalist of Oaeen (Sodagreen) and is the major composer and lyricist of the band. Aside from producing the music for the band, he also writes songs for numerous Mandarin singers. Having nominated at the Golden Melody Award, Global Chinese Golden Chart and so on, he has won several music awards, including the 18th Golden Melody Award for Best Composer in 2007 and the 27th Golden Melody Award for Best Lyricist in 2016. Qing-Feng Wu started to go solo in 2018 to perform and release his works. In 2019, he released his debut solo studio album Spaceman, for which he was nominated in several categories at the 31st Golden Melody Award and won the 31st Golden Melody Award for Best Male Mandarin Singer. In 2021, he was, again, nominated for the Best Male Mandarin Singer for his second solo album Folio Vol.1：One and One.

Sodagreen is a Taiwanese indie band formed in 2001. Its members have been unchanged since 2003. Sodagreen emerged in the Taiwanese indie music scene after receiving the Grand Jury Award in the Hohaiyan Gongliau Rock Festival in 2004, after which it signed a contract with Willlin Music. The band is the first indie band to hold a concert in the Taipei Arena.