  We study the entanglement generation of two giant atoms within a
one-dimensional bidirectional-chiral waveguide quantum electrodynamics (QED)
system, where the initial state of the two giant atoms are $|e_a,g_b\rangle $.
Here, each giant atom is coupled to the waveguide through three connection
points, with the configurations divided into five types based on the
arrangement of coupling points between the giant atoms and the waveguide:
separate, fully braided, partially braided, fully nested, and partially nested.
We explore the entanglement generation process within each configuration in
both nonchiral and chiral coupling cases. It is demonstrated that entanglement
can be controlled as needed by either adjusting the phase shift or selecting
different configurations. For nonchiral coupling, the entanglement of each
configuration exhibits steady state properties attributable to the presence of
dark state. In addition, we find that steady-state entanglement can be obtained
at more phase shifts in certain configurations by increasing the number of
coupling points between the giant atoms and the bidirectional waveguide. In the
case of chiral coupling, the entanglement is maximally enhanced compared to the
one of nonchiral case. Especially in fully braided configuration, the
concurrence reaches its peak value 1, which is robust to chirality. We further
show the influence of atomic initial states on the evolution of interatomic
entanglement. Our scheme can be used for entanglement generation in chiral
quantum networks of giant-atom waveguide-QED systems, with potential
applications in quantum networks and quantum communications.
