ZEROBASEONE (ZB1)

• ZEROBASEONE was formed through Mnet's Boys Planet. All nine original members competed on the survival show and were selected through the April 20, 2023 finale.

• The group originally had nine members. Its debut lineup included Kim Jiwoong, Zhang Hao, Sung Hanbin, Seok Matthew, Kim Taerae, Ricky, Kim Gyuvin, Park Gunwook and Han Yujin.

• ZEROBASEONE currently has five members. The continuing lineup consists of Kim Jiwoong, Sung Hanbin, Seok Matthew, Kim Taerae and Park Gunwook.

• The group's name represents the journey from zero to one. It symbolizes different trainees coming together to begin a new chapter as one group.

• ZEROBASEONE is commonly abbreviated as ZB1. Korean fans also use the nickname Jebewon, derived from the group's Korean name.

• Their official greeting begins with "D1, Be the ONE!" The phrase emphasizes the group's identity and connection to its supporters.

• The fandom name is ZEROSE. It was announced on May 1, 2023, before the group's official debut.

• Zhang Hao finished first on Boys Planet. His victory made him the center of ZEROBASEONE's original lineup.

• Zhang Hao made survival-show history. He became the first foreign contestant to finish first in the final ranking of a Korean Produce-style idol survival program.

• Sung Hanbin finished second on Boys Planet. He had maintained first place throughout most of the competition before the finale.

• Sung Hanbin is the group's leader. He was selected to lead ZEROBASEONE despite not being its oldest member.

• Kim Jiwoong is ZEROBASEONE's oldest member. Born on December 14, 1998, he had already worked as a singer and actor before appearing on Boys Planet.

• Jiwoong previously debuted in another K-pop group. He first entered the idol industry in 2016 with INX, using the stage name Jinam.

• Jiwoong is also known for acting in BL dramas. His notable projects include Kissable Lips and Roommates of Poongduck 304.

• Sung Hanbin was a street dancer before becoming an idol. His specialties include waacking and tutting, both of which require precise body control.

• Hanbin and Seok Matthew were friends before Boys Planet. The two trained together under Cube Entertainment and later debuted in the same group.

• Seok Matthew grew up in Canada. His upbringing in British Columbia gave ZEROBASEONE a strong connection to international audiences.

• Matthew is fluent in English and Korean. His language skills have been especially useful during overseas interviews and promotions.

• Kim Taerae is known for his powerful singing voice. His performance of INFINITE's "Man in Love" became one of his most memorable Boys Planet stages.

• Taerae plays guitar. He began learning the instrument during childhood and has an interest in acoustic and classic Korean music.

• Taerae recorded music for Queen of Tears. His song "More Than Enough" introduced his voice to audiences following the popular 2024 Korean drama.

• Park Gunwook competed on two survival shows. He participated in Extreme Debut: Wild Idol in 2021 before finishing fifth on Boys Planet in 2023.

• Gunwook was involved in debate during his school years. His background in public speaking contributed to his reputation as an articulate performer.

• Ricky became famous for his Boys Planet introduction. His phrase "Young and rich, tall and handsome" quickly became recognizable among viewers.

• Zhang Hao can play the violin. His background in music education distinguished him from many other contestants on Boys Planet.

• Kim Gyuvin is known for his tall stature and playful personality. His expressive reactions and friendships were popular among fans of the original lineup.

• Han Yujin was ZEROBASEONE's original maknae. He was born on March 20, 2007, and debuted at just 16 years old.

• Park Gunwook became the group's new maknae in 2026. The change followed Han Yujin's departure from the continuing lineup.

• ZEROBASEONE debuted on July 10, 2023. Its first mini album was Youth in the Shade, featuring the title track "In Bloom."

• Their debut album achieved million-selling status immediately. The achievement helped establish ZEROBASEONE as one of K-pop's most successful rookie groups.

• ZEROBASEONE earned its first music-show win shortly after debut. "In Bloom" won first place on The Show on July 18, 2023.

• The group became known for exceptionally strong physical album sales. WAKEONE has reported six consecutive million-selling Korean albums.

• ZEROBASEONE won major rookie awards. Its early achievements included recognition at the MAMA Awards, Golden Disc Awards and other Korean music ceremonies.

• The group's second mini album was Melting Point. Released in November 2023, it featured the powerful title track "CRUSH."

• ZEROBASEONE made its Japanese debut in March 2024. The single Yura Yura -Unmei no Hana- introduced the group through an official Japanese release.

• "Feel the POP" became one of the group's recognizable bright-concept songs. It was released in May 2024 on the mini album You Had Me at HELLO.

• "GOOD SO BAD" introduced another side of ZEROBASEONE's sound. The August 2024 single emphasized melodic dance-pop and emotional storytelling.

• ZEROBASEONE released its first Korean full-length album in September 2025. Never Say Never featured "ICONIK" as its title track.

• The group's original contract was planned for approximately two and a half years. The project arrangement followed the temporary-group structure associated with Mnet survival competitions.

• Four members concluded their ZEROBASEONE activities in March 2026. Zhang Hao, Ricky, Kim Gyuvin and Han Yujin departed following the conclusion of the original project period.

• All four departing members had trained under Yuehua Entertainment. Their shared agency background was an important part of their pre-debut connection.

• ZEROBASEONE did not disband in 2026. The remaining five members continued under WAKEONE Entertainment.

• The group's first five-member mini album was Ascend-. Released on May 18, 2026, it featured "TOP 5" as its title track.

• The five-member era introduced a more mature musical direction. The group's 2026 releases incorporated contemporary R&B and minimalist production.

• ZEROBASEONE's first official subunit debuted in September 2026. EMP consists of Seok Matthew and Park Gunwook.

• EMP's first release was a mixtape. EMP Mixtape Vol. 1: We the Extra was released on September 21, 2026.

• Sung Hanbin launched his solo career in October 2026. His debut EP, DEAD, featured the title track "UNDEAD."

• Gunwook became an MC for M Countdown in 2026. He joined TREASURE's So Junghwan and KickFlip's Kyehoon as part of the show's hosting team.

• ZEROBASEONE's members have worked in several entertainment fields. Their individual careers include acting, television hosting, dance competitions, drama soundtracks and solo music.

• The group's history includes two distinct lineups. The original nine-member era ran from 2023 to March 2026, while the five-member era began with the group's reorganization in 2026.

• ZEROBASEONE's official fandom name remained unchanged after the lineup transition. Fans continue to be known as ZEROSE regardless of whether they began supporting the group during the original or current era.