Kang Sung-hoon (hangul:강성훈, born February 22, 1980) is a South Korean singer from the 90's South Korean boy group Sechs Kies.
 Sung-hoon is the main vocalist of SechsKies and is referred to having the best singing voice of the group.
 After Sechskies had disbanded in 2000, Sung-hoon pursued a solo singing career, signed under Laful Entertainment at the time.
 His nickname Hoony is the title for his third album and his official fan club is called Hoony World.
Kang Sung-hoon (Korean: 강성훈 ; born 4 June 1987) is a South Korean professional golfer who plays on the PGA Tour.
Jang Su-won (born July 16, 1980) is a South Korean singer.
 He is known as a robot actor and member of the South Korean boy group, Sechs Kies and the duet group, J-Walk, along with fellow SechsKies member, Kim Jae-duck.
 His nicknames were "Short Man" and "Angel".
Kim Jae-duck (born on August 7 1979) is a South Korean singer, rapper, and choreographer.
 He is known as a member of Sechs Kies, which was a rival band to the top boy group in the 90's, H.O.T. and reunited in 2016.
 When Sechs Kies disbanded in 2000, he started a new band, J-Walk with Jang Suwon, also from Sechs Kies.
 Kim is known for his Busan accent and his nickname is "Ducky" as a reference to his name.
SECHSKIES (pronounced as , Korean: 젝스키스 , Japanese: ジェクスキス ) is a six-member South Korean boy band in 1997.
 They are the "1st-generation K-Pop idols" and were named as one of the top boy groups in the 90's.
 Consisting of members Eun Ji-won, Lee Jai-jin, Kim Jae-duck, Kang Sung-hoon, Ko Ji-yong and Jang Su-won, the group debuted on April 15, 1997.
Lee Jai-jin (Korean:이재진, born July 13, 1979) is a South Korean singer and dancer.
 Jai-jin is the sub rapper and main dancer of the South Korean boy group SechsKies, and served as the group's choreographer.
 SechsKies disbanded in 2000 but made a long-awaited reunion on 'ToToGa 2' special of 'Infinite Challenge' and signed with YG Entertainment in 2016.
Kang Sung-hoon () is a Korean name consisting of the family name Kang and the given name Sung-hoon, and may also refer to:
Eun Ji-won (born June 8, 1978) is a South Korean rapper, host, dancer, composer and leader of the first generation idol group SechsKies (젝스키스).
 After the group's disbandment in 2000, Eun pursued a solo career in 2001 with his first single ("A-Ha") and has mainly focused on hip-hop ever since.
 In addition to his music career, he has appeared on hit shows like "2 Days & 1 Night," "Reply 1997" and "New Journey to the West.
SS Entertainment () is a South Korean record label.
 It previously represented boy group The Legend, Eun Ji-won and Gilme.
Ko Ji-yong (born July 1, 1980) is a member of Sechs Kies, a South Korean first generation K-pop idol dance group which disbanded in 2000 but reunited in 2016.
 Unlike most of the other members, Ko left the entertainment industry and started his own company.
 He made his first television appearance in years when he appeared at Sechs Kies' reunion special on "Infinite Challenge".
 Due his family and work commitments he did not sign a contract with the group's new label YG Entertainment or promote with them as a performer but is considered to be part of the group.
 Since January 2017 he and his son have appeared on the reality show "The Return of Superman".

Question: When did the boy band consisting of Eun Ji-won, Lee Jai-jin, Kim Jae-duck, Kang Sung-hoon, Ko Ji-yong and Jang Su-won disband?
Answer: 2000