  An exclusive event generator is designed for the $e^+e^-$ scan experiments
with the initial state radiation effects up to the second order correction
included. There are seventy hadronic decay modes available with the effective
center-of-mass energy coverage from the two pion mass threshold up to about 6
GeV. The achieved accuracy of initial state radiation correction reaches the
level the generator KKMC achieved. The uncertainty associated with the
calculation of correction factor to the initial state radiation is dominated by
the measurements of the energy-dependence Born cross section. The generator is
coded within the framework of BesEvtGen.
