C. sinensis may refer to: * Camellia sinensis,, a plant species whose leaves and leaf buds are used to produce tea * Celtis sinensis, the Chinese hackberry, a flowering plant species native to slopes in East Asia * Centropus sinensis, the greater coucal or the crow pheasant, a bird species widespread in Asia, from India, east to south China and Indonesia * Cephalotaxus sinensis a coniferous shub or small tree species native to central and southern China * Citrus sinensis, the sweet orange * Clonorchis sinensis, a human liver fluke species * Cryptolepis sinensis, a plant species * Cordyceps sinensis, a species of fungus