Wanna One was a South Korean boy band formed by CJ E&M through the second season of Produce 101. The group was composed of eleven members: Kang Daniel, Park Ji-hoon, Lee Dae-hwi, Kim Jae-hwan, Ong Seong-wu, Park Woo-jin, Lai Kuan-lin, Yoon Ji-sung, Hwang Min-hyun, Bae Jin-young and Ha Sung-woon.

When did wanna One debut exact date?

The group debuted on August 7, 2017, under Swing Entertainment and CJ E&M.

How long was wanna one contract?

Wanna One (워너원; also stylized as WANNA·ONE) was an 11-member boy group under Swing Entertainment. They debuted on August 7, 2017 with their first mini album 1X1=1 (To Be One). They were formed through Mnet's survival reality show Produce 101 Season 2, were they promoted together with a contract of a year and a half.