Research in our laboratory has two primary directions. One is the study of soft condensed matter physics. We are interested in structures, interactions, and dynamics in colloidal suspensions and other complex fluids; interactions and dynamics of colloidal monolayers at liquid-liquid and near liquid-solid interfaces; non-equilibrium processes in suspensions and wetting dynamics at a three-phase contact line between liquid and solid interfaces; sedimentation of non-Brownian particles in simple and complex fluids; viscoelastic properties of biomaterials, active matter and live cells; anomalous diffusion of membrane-bound proteins and lipids in live cells. Laser light scattering, atomic force microscopy, optical and florescent microscopy and multiple particle tracking are used in the study of soft matter and biological physics. The other direction is the study of non-equilibrium dynamics in flow systems. Our main interests in this area concern with the statistical properties of fully developed turbulence, high Rayleigh number thermal convection, boundary layer dynamics and transport phenomena in turbulent flows. Dynamic light scattering, laser Doppler velocimetry (LDV), thermometry, and various imaging techniques are used in the experiments. Our research in these two areas has been supported by the Research Grants Council of Hong Kong SAR and Hong Kong University of Science and Technology.