  We report the realization of a robust and highly controllable two-dimensional
(2D) spin-orbit (SO) coupling with topological non-trivial band structure. By
applying a retro-reflected 2D optical lattice, phase tunable Raman couplings
are formed into the anti-symmetric Raman lattice structure, and generate the 2D
SO coupling with precise inversion and $C_4$ symmetries, leading to
considerably enlarged topological regions. The life time of the 2D SO coupled
Bose-Einstein condensate reaches several seconds, which enables the exploring
of fine tuning interaction effects. These essential advantages of the present
new realization open the door to explore exotic quantum many-body effects and
non-equilibrium dynamics with novel topology.
