  We revisit the so-called "Geodesic Witten Diagrams" (GWDs) \cite{ScalarGWD},
proposed to be the holographic dual configuration of scalar conformal partial
waves, from the perspectives of CFT operator product expansions. To this end,
we explicitly consider three point GWDs which are natural building blocks of
all possible four point GWDs, discuss their gluing procedure through
integration over spectral parameter, and this leads us to a direct
identification with the integral representation of CFT conformal partial waves.
As a main application of this general construction, we consider the holographic
dual of the conformal partial waves for external primary operators with spins.
Moreover, we consider the closely related "split representation" for the bulk
to bulk spinning propagator, to demonstrate how ordinary scalar Witten diagram
with arbitrary spin exchange, can be systematically decomposed into scalar
GWDs. We also discuss how to generalize to spinning cases.
