Hydrodynamical coupling between microstructures yields rich and interesting physics, many of which have been widely utilized by living organisms in nature and engineered mechanical devices, but some are still to be explored.In this talk, I will present several illustrative examples, highlighting the critical nonlocal interplay between microstructures, with special focus placed on the mechanical energy transfer and motion synchronization between solid structures immersed in the hydrodynamic environment.At the Stokes regime, hydrodynamic interactions can be estimated by simple tensor-based arguments following Oseens derivations.Going beyond this limit, coarse-grained particle-based simulations are performed here in providing fresh observations that could be accessible by experimental investigations in the near future.