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The name Mu Tong is a serious identity problem. This page is limited to the documented Akebia source; it must not be used to validate Aristolochia manshuriensis, which can contain aristolochic acid associated with kidney injury and cancer. Dried vine segments are hard to distinguish by casual inspection, so a seller’s local-name label alone is not sufficient. Require a botanical name, regulated source, and analytical quality record. Never collect vines from the wild for medicinal use. The picture is a study illustration, not a key to identify a cut stem. Avoid self-use, especially with kidney disease, pregnancy, prescribed diuretics, or unexplained edema. The warning is especially important for unprocessed bundles sold under only a Chinese common name. The toxic Aristolochia source may be visually similar after slicing, and no casual color, odor, or taste check can rule it out. Ask for Akebia quinata (or the exact pharmacopoeial source stated on the product) and batch documentation; if the seller cannot provide it, do not use it. Keep the profile’s source URL and the safety warning together when sharing the page, so a pairing example cannot be read without the identity context. If the species cannot be documented as the permitted Akebia source, stop the identification exercise and quarantine the sample. Appearance after cutting is not enough. Aristolochic-acid kidney injury may be delayed, which makes casual trial use especially unsafe. Do not test a questionable sample on yourself or another person; retain packaging and seek professional advice.