General MDF and kinematics of the combined bulge sample. Top: (a) MDF for the combined bulge sample (orange), MDFs for the RVS (black), and RPM (green) samples shown separately; (b) distribution of the galactocentric radial velocity (V_R in km s⁻¹). Bottom: (c) galactocentric azimuthal velocity (V_φ); (d) galactocentric vertical velocity (V_Z). The mean and dispersion for the three velocity components, for the total, are also shown and were calculated via bootstrapping resampling.