Not Easy to Identify glueball 1)We do not know the mass precisely probably 1.5-2.5 Ge V/c2 2)The width is probably wide Buried in many normal quark resonance states in the same mass regionNot Easy to Identify Glueball 1) We do not know the mass precisely probably ~ 1.5-2.5 GeV/c2 2) The width is probably wide Buried in many normal quark resonance states in the same mass region !