Enabling efficient excitation energy transport is essential for basic energy science and device applications. However, the inherent disorders and exciton-phonon interactions within these materials restrict transport, resulting in slow, diffusive motion of exciton that constrains the device's performance. Recent experiments have demonstrated that exciton transport is significantly enhanced when they are strongly coupled to cavity modes. This leads to large group velocities up to 40 µm ps -1 for halide perovskites in a Fabry-Pérot (FP) cavity and up to 180 µm ps -1 for an organic semiconductor in a photonic crystal cavity 1 with micrometer range of transport. In Ref. 1 the polariton transport achieves 100 µm in 1 ps, enabling long-range energy transport.