As One (Hangul: 에즈 원, stylized as AS ONE), better known by AS1 in South Korea to avoid confusion with Korean girlband As One, is a Hong Kong Cantopop girl group formed by Sun Entertainment Culture and choreographer Sunny Wong. The meaning behind the group's name is based on the concept of unity, with the members united together "as one". The group consists of four members; Shin, Oli, Elfa and Nata.The group promoted as a quartet for two years until Oli's departure in August 2014 to pursue her studies. Subsequently two new members (Chloe and Kayan) joined the group in March 2015 after emerging as champions of a scouting audition. Elfa announced her temporary hiatus from the group in May 2015 due to sustained injuries. As of 15 May 2015, As One is promoting as a quartet with Shin, Nata, Chloe and Kayan. They are currently training in Korea preparing for their comeback in both South Korea and Hong Kong.