user: 비욘드의 구성원에 대해 설명해 주세요.

gpt: ImageSize = width:900 height:400
PlotArea = left:120 bottom:125 top:0 right:0
Alignbars = justify
DateFormat = dd/mm/yyyy
Period = from:01/01/1983 till:
TimeAxis = orientation:horizontal format:yyyy
Legend = orientation:vertical position:bottom columns:2
ScaleMajor = increment:2 start:1983
ScaleMinor = increment:2 start:1983

Colors =
 id:vocals value:red legend:Vocals
 id:guitar value:green legend:Guitar
 id:bass value:blue legend:Bass
 id:keyboards value:purple legend:Keyboards
 id:drums value:orange legend:Drums,_percussion
 id:lines value:black legend:Studio_albums

Legend = orientation:vertical position:bottom columns:3

ScaleMajor = increment:2 start:1983
ScaleMinor = increment:1 start:1984

LineData =
 at:01/03/1986 color:black layer:back
 at:01/07/1987 color:black layer:back
 at:01/03/1988 color:black layer:back
 at:06/09/1988 color:black layer:back
 at:01/07/1989 color:black layer:back
 at:01/12/1989 color:black layer:back
 at:01/09/1990 color:black layer:back
 at:06/09/1991 color:black layer:back
 at:01/07/1992 color:black layer:back
 at:01/05/1993 color:black layer:back
 at:04/06/1994 color:black layer:back
 at:15/06/1995 color:black layer:back
 at:01/04/1997 color:black layer:back
 at:01/12/1997 color:black layer:back
 at:01/12/1998 color:black layer:back
 at:01/11/1999 color:black layer:back

BarData =
 bar:wongkakui text:"Wong Ka Kui"
 bar:tangwaihim text:"William Tang"
 bar:kwanposhun text:"Owen Kwan"
 bar:chanshion text:"Chan See On"
 bar:wongkwunchung text:"Paul Wong"
 bar:lauchiyuen text:"Lau Chi Yuen"
 bar:leewingchiu text:"Lee Wing Chiu"
 bar:wongkakeung text:"Wong Ka Keung"
 bar:yipsaiwing text:"Yip Sai Wing"

PlotData=
 width:11 textcolor:black align:left anchor:from shift:
 bar:wongkakui from:01/01/1983 till:01/01/1994 color:Vocals
 bar:wongkakui from:01/01/1983 till:01/01/1994 color:Guitar width:3

 bar:tangwaihim from:01/01/1983 till:01/01/1984 color:Guitar

 bar:kwanposhun from:01/01/1984 till:01/01/1985 color:Guitar
 bar:chanshion from:01/01/1985 till:01/01/1986 color:Guitar
 bar:lauchiyuen from:01/01/1986 till:01/01/1989 color:Guitar
 bar:lauchiyuen from:01/01/1986 till:01/01/1989 color:keyboards width:3

 bar:wongkwunchung from:01/01/1986 till:01/01/1994 color:Guitar
 bar:wongkwunchung from:01/01/1986 till:01/01/1994 color:Vocals width:3
 bar:wongkwunchung from:01/01/1994 till:01/01/2000 color:Guitar width:3
 bar:wongkwunchung from:01/01/1994 till:01/01/2000 color:Vocals
 bar:wongkwunchung from:01/01/2003 till:01/01/2006 color:Guitar width:3
 bar:wongkwunchung from:01/01/2003 till:01/01/2006 color:Vocals

 bar:leewingchiu from:01/01/1983 till:01/01/1984 color:Bass

 bar:wongkakeung from:01/01/1984 till:01/01/1994 color:Bass
 bar:wongkakeung from:01/01/1984 till:01/01/1994 color:Vocals width:3
 bar:wongkakeung from:01/01/1994 till:01/01/1995 color:Bass width:7
 bar:wongkakeung from:01/01/1994 till:01/01/1995 color:Guitar width:3
 bar:wongkakeung from:01/01/1994 till:01/01/2000 color:Vocals
 bar:wongkakeung from:01/01/1995 till:01/01/2000 color:Bass width:3
 bar:wongkakeung from:01/01/2003 till:01/01/2006 color:Bass width:3
 bar:wongkakeung from:01/01/2003 till:01/01/2006 color:Vocals

 bar:yipsaiwing from:01/01/1983 till:01/01/2000 color:Drums
 bar:yipsaiwing from:01/01/1983 till:01/01/2000 color:Vocals width:3
 bar:yipsaiwing from:01/01/2003 till:01/01/2006 color:Drums
 bar:yipsaiwing from:01/01/2003 till:01/01/2006 color:Vocals width:3