Who knows the beast? Please introduce it in detail.

Company: Cube Entertainment B2ST Name Meaning: Boys come to search for Top Leader Yoon Korean Name:? 3? 3? 9? 3? 3? 9 (Yoon Du Jun) Nickname: Three Seconds and Team Yin Position: Captain, Vocal Birthday:1July 4th, 989 Constellation: Cancer Height: 179cm Weight: 66kg Constellation: Cancer Blood Type: Type A Interest/Specialty: Football, Piano, The first piano song in the game: "Now and Forever" Education: Second-year combination of journalism department of Neushin University: BEAST Company: CUBE Entertainment Personal experience: third place in the 1 selection meeting held with MGM. E 01-e10 was transferred to CUBE Company for internship in 2009, and participated in Li Qiguang (AJ) in 2009.