Yǎngzhí jīnqiánzhì shì yìxiē nónghù de zhòngyào fùyè.
Farming Japanese medicinal leeches is an important side business for some rural households.
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Named 金钱 (coin) for the row of yellow-gold rings along its back that look like stacked cash. Dried leech (水蛭) is listed in the 《神农本草经》 and is still used today to treat blood stasis; the strong anticoagulant hirudin is the active principle.
