On July 1, 2016, NCT 127 was announced as the second sub-unit, a Seoul-based, multi-national boy group that would promote actively in South Korea. During the presentation, Lee also announced plans to debut the first NCT unit within the first half of 2016 in Seoul and Tokyo, with sub-units based in Chinese cities to follow in the latter half of the year and units in Southeast Asia and Latin America later. NCT was to be SM Entertainment's first idol group to debut since Red Velvet in August 2014 and the label's first boy group to debut since South Korean–Chinese boy band Exo in 2012. Lee revealed the name of the group to be NCT, an acronym of the presentation title. The group would have 'sub-unit teams' of different members from different cities around the world, and the units would collaborate with each other frequently.

Lee announced that the label planned to debut a new boy group with an 'unlimited' number of members, in alignment with their ' culture contents' strategy. In January 2016, SM Entertainment founder Lee Soo-man delivered a presentation at the SM Coex Artium titled 'SMTOWN: New Culture Technology 2016'. In 2022, NCT 127 released their fourth Korean studio album 2 Baddies, which sold 3.2 million copies and made them the second K-pop act to have three albums debut in the top five of the Billboard 200. Sticker debuted at number three on the Billboard 200, becoming the longest and highest-charting K-pop album in the US in 2021. With a combined 3.58 million copies sold, it broke the record for the best-selling album of all time by an act under SM Entertainment and earned the group the Daesang award at the 31st Seoul Music Awards. In 2021, NCT 127 released their third Korean studio album, Sticker, and its repackaged version Favorite. The unit subsequently released the EP We Are Superhuman that year and their second Korean studio album, Neo Zone, in 2020, the latter becoming their first top-five entry on the US Billboard 200 and their first release to sell over one million copies.

In April 2019, NCT 127's increasing global popularity prompted SM Entertainment to sign marketing and distribution deals with Capitol Music Group and Caroline Distribution, respectively. They are known for their experimental hip hop-based music, which they refer to as ' neo music', they are also noted for their vocal and rap abilities, as well as their choreographies and performances.Īfter debuting in 2016, they broke into the domestic mainstream in 2017 with ' Cherry Bomb', now recognized as one of their signature songs, and received greater international attention following the release of ' Kick It' in 2020. Three members Doyoung and Johnny joined the unit in December 2016, ahead of their second EP Limitless, while Jungwoo, the final member, was introduced in September 2018 ahead of their first studio album Regular-Irregular. They originally debuted on July 7, 2016, with their debut extended play NCT #127, with an original lineup of seven members: Taeil, Taeyong, Yuta, Jaehyun, Winwin, Mark, and Haechan. NCT 127 ( Korean: 엔시티 127 RR: Ensiti Il-i-chil) is the first fixed and second overall sub-unit of the South Korean boy band NCT, formed and managed by SM Entertainment.

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