Northern Cangzhu: Nodular cylindrical, with a dark brown surface. Northern Cangzhu. Southern Cangzhu: Beaded, jointed, curved, grayish-brown. Maoshan Cangzhu: Easily broken, grows white mold and frost when stored. Sliced Cangzhu. Sliced Cangzhu processed with rice-washing water. Distinct cinnabar spots visible...