  Using the Gaia DR2 and EDR3 data and list of post-AGB candidates, we
investigate the parallax, proper motion and binarity for twenty post-AGB stars
and candidates having high radial velocities. From their Gaia distances their
luminosities and kinematics are derived. The evolutionary status of these stars
is discussed from their location on the post-AGB evolutionary tracks. Nine
stars are confirmed to be post-AGB stars that have their initial main-sequence
mass around one or two solar masses. From their kinematics information, two
objects among them are identified to clearly belong to the halo population,
suggesting that low-mass. We discuss on the origin and evolutionary status of
other objects in the sample of this work with high radial velocities.
