Chinese traditional medicinal crops are well- known in the world. Unfortunately, they were contaminated by heavy metal due to production places polluted by heavy metal. Heavy metal absorbing abilities varied with various species of Chinese traditional medicinal crops, which contributes to different the contents of heavy metals in these crops. As a result, the contents of heavy metals were up to Green Trade Standards of Importing & Exporting Medicinal Plants & Preparations and cadmium (Cd), copper ...