  In this paper, we construct local and global solutions to the K\"ahler-Ricci
flow from a non-collapsed K\"ahler manifold with curvature bounded from below.
Combines with the mollification technique of McLeod-Simon-Topping, we show that
the Gromov-Hausdorff limit of sequence of complete noncompact non-collapsed
K\"ahler manifolds with orthogonal bisectional curvature and Ricci curvature
bounded from below is homeomorphic to a complex manifold. We also use it to
study the complex structure of complete K\"ahler manifolds with nonnegative
orthogonal bisectional curvature, nonnegative Ricci curvature and maximal
volume growth.
