2. Different usage methods: Raw Polygonum multiflorum Thunb is mostly used as medicine, while prepared Polygonum multiflorum Thunb is used for dietotherapy and health care products.
3. Different morphological characteristics: Polygonum multiflorum Thunb is a perennial plant. The tuberous root is thick, oblong and dark brown. Stems twining, 2-4 meters long, multi-branched, with longitudinal edges, hairless, slightly rough, lignified at the lower part. Radix Polygoni Multiflori Preparata is in the shape of irregular shrinkage, with a thickness of about 1cm. The surface is dark brown or brown, uneven. Hard, horny section, brown or black. Slight gas, slightly sweet and bitter taste.