  Using unbiased observations of MAXI/GSC the potential contribution of stellar
flares and CVs to GRXE luminosity is estimated in the energy range of 2 - 10
keV. Currently, a reasonable luminosity has been obtained extrapolating the
number of stellar flares and that of CVs toward the Galactic ridge from those
of the observed flares and CVs near the solar system. The ionized emission
lines of Si to Fe are also simulated making the composite thermal spectrum
which is based on MAXI observations of stellar flares and CVs. The present
estimated result strongly supports a picture that the cumulative stellar flares
contribute primarily to the GRXE in terms of the composite thermal spectrum
with emission lines and secondary contribution is due to the thermal spectrum
with high temperature from CVs.
