Wutong, Panghaida. It is named after the spongy appearance of seeds when exposed to water. It is a traditional Chinese medicine with a sweet and cold taste, and has the effects of clearing heat, moistening the lungs, moistening the intestines, relieving constipation, lowering blood pressure, detoxifying and promoting pharynx. Fat sea has certain toxicity, and its nuts can cause breathing difficulties, pulmonary congestion and edema, and motor disorders in animals. Yifei reported that its analgesic effect may lead to neurological inhibition. Clinical applications have found that very few patients are allergic to Panghai, which can even be fatal.