T_eff − log g diagram of the confirmed short-period binary hot subdwarfs from light curves and the literature. Left panel: Newly found reflection effect or HW Vir systems (blue circles) and the newly discovered ellipsoidal deformation systems (red squares). Right panel: Known short-period binary hot subdwarfs in the literature and our newly found short-period binaries through light curves. Hot subdwarfs with MS or BD companions and WD companions are labeled as blue triangles and red pentagons, respectively. Short-period binary hot subdwarfs with an unknown companion type are labeled as green diamonds.